/* eslint-disable */
/* eslint-enable no-undef, prettier/prettier, no-unused-vars */
import {
  mxConstants,
  mxResources,
  mxEventObject,
  mxEvent,
  mxUtils,
  mxDictionary,
  mxClient,
  mxRectangle,
  mxPopupMenu,
  mxPoint,
  mxKeyHandler,
  mxGraphModel,
  mxImage,
  mxOutline,
  mxClipboard,
  mxStackLayout,
  mxEventSource,
  mxObjectCodec,
  mxObjectIdentity,
  mxCodecRegistry,
  mxMorphing,
} from "../../core/mxgraph";
import { Actions } from "./Actions";
import { Editor, Dialog, ErrorDialog } from "./Editor";
import { Sidebar } from "./Sidebar";
import { Menus } from "./Menus";
import { Graph, HoverIcons } from "./Graph";
import { Toolbar } from "./Toolbar";
import { Format } from "./Format";
import { ColorDialog } from "./Dialogs";
import { submenuImage } from "../images/base64";

export { ChangePageSetup, EditorUi };

/**
 * Copyright (c) 2006-2012, JGraph Ltd
 */
/**
 * Constructs a new graph editor
 */
function EditorUi(editor, container, lightbox, renderExitButton) {
  mxEventSource.call(this);

  this.destroyFunctions = [];
  this.editor = editor || new Editor();
  this.container = container || document.body;

  const graph = this.editor.graph;
  graph.lightbox = lightbox;

  // Faster scrollwheel zoom is possible with CSS transforms
  if (graph.useCssTransforms) {
    this.lazyZoomDelay = 0;
  }

  // Pre-fetches submenu image or replaces with embedded image if supported
  mxPopupMenu.prototype.submenuImage = submenuImage;

  // 处理菜单的挂载容器
  mxPopupMenu.prototype.showMenu = function () {
    container.appendChild(this.div);
    mxUtils.fit(this.div);
  };
  // 处理菜单的挂载子容器
  mxPopupMenu.prototype.showSubmenu = function (parent, row) {
    if (row.div != null) {
      row.div.style.left = parent.div.offsetLeft + row.offsetLeft + row.offsetWidth - 1 + "px";
      row.div.style.top = parent.div.offsetTop + row.offsetTop + "px";
      container.appendChild(row.div);
      const left = parseInt(row.div.offsetLeft);
      const width = parseInt(row.div.offsetWidth);
      const offset = mxUtils.getDocumentScrollOrigin(document);
      const b = document.body;
      const d = document.documentElement;
      const right = offset.x + (b.clientWidth || d.clientWidth);
      if (left + width > right) {
        row.div.style.left =
          Math.max(0, parent.div.offsetLeft - width + (mxClient.IS_IE ? 6 : -6)) + "px";
      }
      mxUtils.fit(row.div);
    }
  };

  // Disables graph and forced panning in chromeless mode
  if (this.editor.chromeless && !this.editor.editable) {
    this.footerHeight = 0;
    graph.isEnabled = function () {
      return false;
    };
    graph.panningHandler.isForcePanningEvent = function (me) {
      return !mxEvent.isPopupTrigger(me.getEvent());
    };
  }

  // Creates the user interface
  this.actions = new Actions(this);
  this.menus = this.createMenus();

  if (!graph.standalone) {
    this.createDivs();
    this.createUi();
    this.refresh();

    renderExitButton && renderExitButton(this.exitButton);

    // Disables HTML and text selection
    const textEditing = mxUtils.bind(this, function (evt) {
      if (evt == null) {
        evt = window.event;
      }

      return graph.isEditing() || (evt != null && this.isSelectionAllowed(evt));
    });

    // Disables text selection while not editing and no dialog visible
    if (this.container == document.body) {
      this.menubarContainer.onselectstart = textEditing;
      this.menubarContainer.onmousedown = textEditing;
      this.toolbarContainer.onselectstart = textEditing;
      this.toolbarContainer.onmousedown = textEditing;
      this.diagramContainer.onselectstart = textEditing;
      this.diagramContainer.onmousedown = textEditing;
      this.sidebarContainer.onselectstart = textEditing;
      this.sidebarContainer.onmousedown = textEditing;
      this.formatContainer.onselectstart = textEditing;
      this.formatContainer.onmousedown = textEditing;
      this.footerContainer.onselectstart = textEditing;
      this.footerContainer.onmousedown = textEditing;

      if (this.tabContainer != null) {
        // Mouse down is needed for drag and drop
        this.tabContainer.onselectstart = textEditing;
      }
    }

    // And uses built-in context menu while editing
    if (!this.editor.chromeless || this.editor.editable) {
      // Allows context menu for links in hints
      const linkHandler = function (evt) {
        if (evt != null) {
          let source = mxEvent.getSource(evt);

          if (source.nodeName == "A") {
            while (source != null) {
              if (source.className == "geHint") {
                return true;
              }

              source = source.parentNode;
            }
          }
        }

        return textEditing(evt);
      };

      if (
        mxClient.IS_IE &&
        (typeof document.documentMode === "undefined" || document.documentMode < 9)
      ) {
        mxEvent.addListener(this.diagramContainer, "contextmenu", linkHandler);
      } else {
        // Allows browser context menu outside of diagram and sidebar
        this.diagramContainer.oncontextmenu = linkHandler;
      }
    } else {
      graph.panningHandler.usePopupTrigger = false;
    }

    // Contains the main graph instance inside the given panel
    graph.init(this.diagramContainer);

    // Improves line wrapping for in-place editor
    if (graph.view.getDrawPane() != null) {
      const root = graph.view.getDrawPane().ownerSVGElement;

      if (root != null) {
        root.style.position = "absolute";
      }
    }

    // Creates hover icons
    this.hoverIcons = this.createHoverIcons();

    // Hides hover icons when cells are moved
    if (graph.graphHandler != null) {
      const graphHandlerStart = graph.graphHandler.start;

      graph.graphHandler.start = function () {
        if (ui.hoverIcons != null) {
          ui.hoverIcons.reset();
        }

        graphHandlerStart.apply(this, arguments);
      };
    }

    // Adds tooltip when mouse is over scrollbars to show space-drag panning option
    mxEvent.addListener(
      this.diagramContainer,
      "mousemove",
      mxUtils.bind(this, function (evt) {
        const off = mxUtils.getOffset(this.diagramContainer);

        if (
          mxEvent.getClientX(evt) - off.x - this.diagramContainer.clientWidth > 0 ||
          mxEvent.getClientY(evt) - off.y - this.diagramContainer.clientHeight > 0
        ) {
          this.diagramContainer.setAttribute("title", mxResources.get("panTooltip"));
        } else {
          this.diagramContainer.removeAttribute("title");
        }
      })
    );

    // Escape key hides dialogs, adds space+drag panning
    let spaceKeyPressed = false;

    // Overrides hovericons to disable while space key is pressed
    const hoverIconsIsResetEvent = this.hoverIcons.isResetEvent;

    this.hoverIcons.isResetEvent = function () {
      return spaceKeyPressed || hoverIconsIsResetEvent.apply(this, arguments);
    };

    this.keydownHandler = mxUtils.bind(this, function (evt) {
      if (evt.which == 32 /* Space */ && !graph.isEditing()) {
        spaceKeyPressed = true;
        this.hoverIcons.reset();
        graph.container.style.cursor = "move";

        // Disables scroll after space keystroke with scrollbars
        if (!graph.isEditing() && mxEvent.getSource(evt) == graph.container) {
          mxEvent.consume(evt);
        }
      } else if (!mxEvent.isConsumed(evt) && evt.keyCode == 27 /* Escape */) {
        this.hideDialog(null, true);
      }
    });

    mxEvent.addListener(document, "keydown", this.keydownHandler);

    this.keyupHandler = mxUtils.bind(this, function () {
      graph.container.style.cursor = "";
      spaceKeyPressed = false;
    });

    mxEvent.addListener(document, "keyup", this.keyupHandler);

    // Forces panning for middle and right mouse buttons
    const panningHandlerIsForcePanningEvent = graph.panningHandler.isForcePanningEvent;
    graph.panningHandler.isForcePanningEvent = function (me) {
      // Ctrl+left button is reported as right button in FF on Mac
      return (
        panningHandlerIsForcePanningEvent.apply(this, arguments) ||
        spaceKeyPressed ||
        (mxEvent.isMouseEvent(me.getEvent()) &&
          (this.usePopupTrigger || !mxEvent.isPopupTrigger(me.getEvent())) &&
          ((!mxEvent.isControlDown(me.getEvent()) && mxEvent.isRightMouseButton(me.getEvent())) ||
            mxEvent.isMiddleMouseButton(me.getEvent())))
      );
    };

    // Ctrl/Cmd+Enter applies editing value except in Safari where Ctrl+Enter creates
    // a new line (while Enter creates a new paragraph and Shift+Enter stops)
    const cellEditorIsStopEditingEvent = graph.cellEditor.isStopEditingEvent;
    graph.cellEditor.isStopEditingEvent = function (evt) {
      return (
        cellEditorIsStopEditingEvent.apply(this, arguments) ||
        (evt.keyCode == 13 &&
          ((!mxClient.IS_SF && mxEvent.isControlDown(evt)) ||
            (mxClient.IS_MAC && mxEvent.isMetaDown(evt)) ||
            (mxClient.IS_SF && mxEvent.isShiftDown(evt))))
      );
    };

    // Adds space+wheel for zoom
    const graphIsZoomWheelEvent = graph.isZoomWheelEvent;

    graph.isZoomWheelEvent = function () {
      return spaceKeyPressed || graphIsZoomWheelEvent.apply(this, arguments);
    };

    // Switches toolbar for text editing
    let textMode = false;
    let fontMenu = null;
    let sizeMenu = null;
    let nodes = null;

    const updateToolbar = mxUtils.bind(this, function () {
      if (this.toolbar != null && textMode != graph.cellEditor.isContentEditing()) {
        let node = this.toolbar.container.firstChild;
        const newNodes = [];

        while (node != null) {
          const tmp = node.nextSibling;

          if (mxUtils.indexOf(this.toolbar.staticElements, node) < 0) {
            node.parentNode.removeChild(node);
            newNodes.push(node);
          }

          node = tmp;
        }

        // Saves references to special items
        const tmp1 = this.toolbar.fontMenu;
        const tmp2 = this.toolbar.sizeMenu;

        if (nodes == null) {
          this.toolbar.createTextToolbar();
        } else {
          for (let i = 0; i < nodes.length; i++) {
            this.toolbar.container.appendChild(nodes[i]);
          }

          // Restores references to special items
          this.toolbar.fontMenu = fontMenu;
          this.toolbar.sizeMenu = sizeMenu;
        }

        textMode = graph.cellEditor.isContentEditing();
        fontMenu = tmp1;
        sizeMenu = tmp2;
        nodes = newNodes;
      }
    });

    var ui = this;

    // Overrides cell editor to update toolbar
    const cellEditorStartEditing = graph.cellEditor.startEditing;
    graph.cellEditor.startEditing = function () {
      cellEditorStartEditing.apply(this, arguments);
      updateToolbar();

      if (graph.cellEditor.isContentEditing()) {
        let updating = false;

        const updateCssHandler = function () {
          if (!updating) {
            updating = true;

            window.setTimeout(function () {
              const selectedElement = graph.getSelectedElement();
              let node = selectedElement;

              while (node != null && node.nodeType != mxConstants.NODETYPE_ELEMENT) {
                node = node.parentNode;
              }

              if (node != null) {
                const css = mxUtils.getCurrentStyle(node);

                if (css != null && ui.toolbar != null) {
                  // Strips leading and trailing quotes
                  let ff = css.fontFamily;

                  if (ff.charAt(0) == "'") {
                    ff = ff.substring(1);
                  }

                  if (ff.charAt(ff.length - 1) == "'") {
                    ff = ff.substring(0, ff.length - 1);
                  }

                  ui.toolbar.setFontName(ff);
                  ui.toolbar.setFontSize(parseInt(css.fontSize));
                }
              }

              updating = false;
            }, 0);
          }
        };

        mxEvent.addListener(graph.cellEditor.textarea, "input", updateCssHandler);
        mxEvent.addListener(graph.cellEditor.textarea, "touchend", updateCssHandler);
        mxEvent.addListener(graph.cellEditor.textarea, "mouseup", updateCssHandler);
        mxEvent.addListener(graph.cellEditor.textarea, "keyup", updateCssHandler);
        updateCssHandler();
      }
    };

    // Updates toolbar and handles possible errors
    const cellEditorStopEditing = graph.cellEditor.stopEditing;
    graph.cellEditor.stopEditing = function () {
      try {
        cellEditorStopEditing.apply(this, arguments);
        updateToolbar();
      } catch (e) {
        ui.handleError(e);
      }
    };

    // Enables scrollbars and sets cursor style for the container
    graph.container.setAttribute("tabindex", "0");
    graph.container.style.cursor = "default";

    // Workaround for page scroll if embedded via iframe
    if (window.self === window.top && graph.container.parentNode != null) {
      try {
        graph.container.focus();
      } catch (e) {
        // ignores error in old versions of IE
      }
    }

    // Keeps graph container focused on mouse down
    const graphFireMouseEvent = graph.fireMouseEvent;
    graph.fireMouseEvent = function (evtName) {
      if (evtName == mxEvent.MOUSE_DOWN) {
        this.container.focus();
      }

      graphFireMouseEvent.apply(this, arguments);
    };

    // Configures automatic expand on mouseover
    graph.popupMenuHandler.autoExpand = true;

    // Installs context menu
    if (this.menus != null) {
      graph.popupMenuHandler.factoryMethod = mxUtils.bind(this, function (menu, cell, evt) {
        this.menus.createPopupMenu(menu, cell, evt);
      });
    }

    // Hides context menu
    mxEvent.addGestureListeners(
      document,
      mxUtils.bind(this, function () {
        graph.popupMenuHandler.hideMenu();
      })
    );

    // Create handler for key events
    this.keyHandler = this.createKeyHandler(editor);

    // Getter for key handler
    this.getKeyHandler = function () {
      return this.keyHandler;
    };

    // Stores the current style and assigns it to new cells
    const styles = [
      "rounded",
      "shadow",
      "glass",
      "dashed",
      "dashPattern",
      "comic",
      "labelBackgroundColor",
    ];
    const connectStyles = [
      "shape",
      "edgeStyle",
      "curved",
      "rounded",
      "elbow",
      "comic",
      "jumpStyle",
      "jumpSize",
    ];

    // Note: Everything that is not in styles is ignored (styles is augmented below)
    this.setDefaultStyle = function (cell) {
      try {
        const state = graph.view.getState(cell);

        if (state != null) {
          // Ignores default styles
          const clone = cell.clone();
          clone.style = "";
          const defaultStyle = graph.getCellStyle(clone);
          const values = [];
          const keys = [];

          for (var key in state.style) {
            if (defaultStyle[key] != state.style[key]) {
              values.push(state.style[key]);
              keys.push(key);
            }
          }

          // Handles special case for value "none"
          const cellStyle = graph.getModel().getStyle(state.cell);
          const tokens = cellStyle != null ? cellStyle.split(";") : [];

          for (let i = 0; i < tokens.length; i++) {
            const tmp = tokens[i];
            const pos = tmp.indexOf("=");

            if (pos >= 0) {
              var key = tmp.substring(0, pos);
              const value = tmp.substring(pos + 1);

              if (defaultStyle[key] != null && value == "none") {
                values.push(value);
                keys.push(key);
              }
            }
          }

          // Resets current style
          if (graph.getModel().isEdge(state.cell)) {
            graph.currentEdgeStyle = {};
          } else {
            graph.currentVertexStyle = {};
          }

          this.fireEvent(
            new mxEventObject("styleChanged", "keys", keys, "values", values, "cells", [state.cell])
          );
        }
      } catch (e) {
        this.handleError(e);
      }
    };

    this.clearDefaultStyle = function () {
      graph.currentEdgeStyle = mxUtils.clone(graph.defaultEdgeStyle);
      graph.currentVertexStyle = mxUtils.clone(graph.defaultVertexStyle);

      // Updates UI
      this.fireEvent(new mxEventObject("styleChanged", "keys", [], "values", [], "cells", []));
    };

    // Keys that should be ignored if the cell has a value (known: new default for all cells is html=1 so
    // for the html key this effecticely only works for edges inserted via the connection handler)
    const valueStyles = ["fontFamily", "fontSize", "fontColor"];

    // Keys that always update the current edge style regardless of selection
    const alwaysEdgeStyles = [
      "edgeStyle",
      "startArrow",
      "startFill",
      "startSize",
      "endArrow",
      "endFill",
      "endSize",
    ];

    // Keys that are ignored together (if one appears all are ignored)
    const keyGroups = [
      [
        "startArrow",
        "startFill",
        "startSize",
        "sourcePerimeterSpacing",
        "endArrow",
        "endFill",
        "endSize",
        "targetPerimeterSpacing",
      ],
      ["strokeColor", "strokeWidth"],
      ["fillColor", "gradientColor"],
      valueStyles,
      ["opacity"],
      ["align"],
      ["html"],
    ];

    // Adds all keys used above to the styles array
    for (var i = 0; i < keyGroups.length; i++) {
      for (let j = 0; j < keyGroups[i].length; j++) {
        styles.push(keyGroups[i][j]);
      }
    }

    for (var i = 0; i < connectStyles.length; i++) {
      if (mxUtils.indexOf(styles, connectStyles[i]) < 0) {
        styles.push(connectStyles[i]);
      }
    }

    // Implements a global current style for edges and vertices that is applied to new cells
    const insertHandler = function (cells, asText) {
      const model = graph.getModel();

      model.beginUpdate();
      try {
        for (let i = 0; i < cells.length; i++) {
          const cell = cells[i];

          var appliedStyles;

          if (asText) {
            // Applies only basic text styles
            appliedStyles = ["fontSize", "fontFamily", "fontColor"];
          } else {
            // Removes styles defined in the cell style from the styles to be applied
            const cellStyle = model.getStyle(cell);
            const tokens = cellStyle != null ? cellStyle.split(";") : [];
            appliedStyles = styles.slice();

            for (var j = 0; j < tokens.length; j++) {
              const tmp = tokens[j];
              const pos = tmp.indexOf("=");

              if (pos >= 0) {
                var key = tmp.substring(0, pos);
                const index = mxUtils.indexOf(appliedStyles, key);

                if (index >= 0) {
                  appliedStyles.splice(index, 1);
                }

                // Handles special cases where one defined style ignores other styles
                for (let k = 0; k < keyGroups.length; k++) {
                  const group = keyGroups[k];

                  if (mxUtils.indexOf(group, key) >= 0) {
                    for (let l = 0; l < group.length; l++) {
                      const index2 = mxUtils.indexOf(appliedStyles, group[l]);

                      if (index2 >= 0) {
                        appliedStyles.splice(index2, 1);
                      }
                    }
                  }
                }
              }
            }
          }

          // Applies the current style to the cell
          const edge = model.isEdge(cell);
          const current = edge ? graph.currentEdgeStyle : graph.currentVertexStyle;
          let newStyle = model.getStyle(cell);

          for (var j = 0; j < appliedStyles.length; j++) {
            var key = appliedStyles[j];
            const styleValue = current[key];

            if (styleValue != null && (key != "shape" || edge)) {
              // Special case: Connect styles are not applied here but in the connection handler
              if (!edge || mxUtils.indexOf(connectStyles, key) < 0) {
                newStyle = mxUtils.setStyle(newStyle, key, styleValue);
              }
            }
          }

          model.setStyle(cell, newStyle);
        }
      } finally {
        model.endUpdate();
      }
    };

    graph.addListener("cellsInserted", function (sender, evt) {
      insertHandler(evt.getProperty("cells"));
    });

    graph.addListener("textInserted", function (sender, evt) {
      insertHandler(evt.getProperty("cells"), true);
    });

    graph.connectionHandler.addListener(mxEvent.CONNECT, function (sender, evt) {
      const cells = [evt.getProperty("cell")];

      if (evt.getProperty("terminalInserted")) {
        cells.push(evt.getProperty("terminal"));
      }

      insertHandler(cells);
    });

    this.addListener(
      "styleChanged",
      mxUtils.bind(this, function (sender, evt) {
        // Checks if edges and/or vertices were modified
        const cells = evt.getProperty("cells");
        let vertex = false;
        let edge = false;

        if (cells.length > 0) {
          for (var i = 0; i < cells.length; i++) {
            vertex = graph.getModel().isVertex(cells[i]) || vertex;
            edge = graph.getModel().isEdge(cells[i]) || edge;

            if (edge && vertex) {
              break;
            }
          }
        } else {
          vertex = true;
          edge = true;
        }

        const keys = evt.getProperty("keys");
        const values = evt.getProperty("values");

        for (var i = 0; i < keys.length; i++) {
          const common = mxUtils.indexOf(valueStyles, keys[i]) >= 0;

          // Ignores transparent stroke colors
          if (keys[i] != "strokeColor" || (values[i] != null && values[i] != "none")) {
            // Special case: Edge style and shape
            if (mxUtils.indexOf(connectStyles, keys[i]) >= 0) {
              if (edge || mxUtils.indexOf(alwaysEdgeStyles, keys[i]) >= 0) {
                if (values[i] == null) {
                  delete graph.currentEdgeStyle[keys[i]];
                } else {
                  graph.currentEdgeStyle[keys[i]] = values[i];
                }
              }
              // Uses style for vertex if defined in styles
              else if (vertex && mxUtils.indexOf(styles, keys[i]) >= 0) {
                if (values[i] == null) {
                  delete graph.currentVertexStyle[keys[i]];
                } else {
                  graph.currentVertexStyle[keys[i]] = values[i];
                }
              }
            } else if (mxUtils.indexOf(styles, keys[i]) >= 0) {
              if (vertex || common) {
                if (values[i] == null) {
                  delete graph.currentVertexStyle[keys[i]];
                } else {
                  graph.currentVertexStyle[keys[i]] = values[i];
                }
              }

              if (edge || common || mxUtils.indexOf(alwaysEdgeStyles, keys[i]) >= 0) {
                if (values[i] == null) {
                  delete graph.currentEdgeStyle[keys[i]];
                } else {
                  graph.currentEdgeStyle[keys[i]] = values[i];
                }
              }
            }
          }
        }

        if (this.toolbar != null) {
          this.toolbar.setFontName(
            graph.currentVertexStyle["fontFamily"] || Menus.prototype.defaultFont
          );
          this.toolbar.setFontSize(
            graph.currentVertexStyle["fontSize"] || Menus.prototype.defaultFontSize
          );

          if (this.toolbar.edgeStyleMenu != null) {
            // Updates toolbar icon for edge style
            const edgeStyleDiv = this.toolbar.edgeStyleMenu.getElementsByTagName("div")[0];

            if (
              graph.currentEdgeStyle["edgeStyle"] == "orthogonalEdgeStyle" &&
              graph.currentEdgeStyle["curved"] == "1"
            ) {
              edgeStyleDiv.className = "geSprite geSprite-curved";
            } else if (
              graph.currentEdgeStyle["edgeStyle"] == "straight" ||
              graph.currentEdgeStyle["edgeStyle"] == "none" ||
              graph.currentEdgeStyle["edgeStyle"] == null
            ) {
              edgeStyleDiv.className = "geSprite geSprite-straight";
            } else if (graph.currentEdgeStyle["edgeStyle"] == "entityRelationEdgeStyle") {
              edgeStyleDiv.className = "geSprite geSprite-entity";
            } else if (graph.currentEdgeStyle["edgeStyle"] == "elbowEdgeStyle") {
              edgeStyleDiv.className =
                "geSprite geSprite-" +
                (graph.currentEdgeStyle["elbow"] == "vertical"
                  ? "verticalelbow"
                  : "horizontalelbow");
            } else if (graph.currentEdgeStyle["edgeStyle"] == "isometricEdgeStyle") {
              edgeStyleDiv.className =
                "geSprite geSprite-" +
                (graph.currentEdgeStyle["elbow"] == "vertical"
                  ? "verticalisometric"
                  : "horizontalisometric");
            } else {
              edgeStyleDiv.className = "geSprite geSprite-orthogonal";
            }
          }

          if (this.toolbar.edgeShapeMenu != null) {
            // Updates icon for edge shape
            const edgeShapeDiv = this.toolbar.edgeShapeMenu.getElementsByTagName("div")[0];

            if (graph.currentEdgeStyle["shape"] == "link") {
              edgeShapeDiv.className = "geSprite geSprite-linkedge";
            } else if (graph.currentEdgeStyle["shape"] == "flexArrow") {
              edgeShapeDiv.className = "geSprite geSprite-arrow";
            } else if (graph.currentEdgeStyle["shape"] == "arrow") {
              edgeShapeDiv.className = "geSprite geSprite-simplearrow";
            } else {
              edgeShapeDiv.className = "geSprite geSprite-connection";
            }
          }

          // Updates icon for optinal line start shape
          if (this.toolbar.lineStartMenu != null) {
            const lineStartDiv = this.toolbar.lineStartMenu.getElementsByTagName("div")[0];

            lineStartDiv.className = this.getCssClassForMarker(
              "start",
              graph.currentEdgeStyle["shape"],
              graph.currentEdgeStyle[mxConstants.STYLE_STARTARROW],
              mxUtils.getValue(graph.currentEdgeStyle, "startFill", "1")
            );
          }

          // Updates icon for optinal line end shape
          if (this.toolbar.lineEndMenu != null) {
            const lineEndDiv = this.toolbar.lineEndMenu.getElementsByTagName("div")[0];

            lineEndDiv.className = this.getCssClassForMarker(
              "end",
              graph.currentEdgeStyle["shape"],
              graph.currentEdgeStyle[mxConstants.STYLE_ENDARROW],
              mxUtils.getValue(graph.currentEdgeStyle, "endFill", "1")
            );
          }
        }
      })
    );

    // Update font size and font family labels
    if (this.toolbar != null) {
      const update = mxUtils.bind(this, function () {
        let ff = graph.currentVertexStyle["fontFamily"] || "Helvetica";
        let fs = String(graph.currentVertexStyle["fontSize"] || "12");
        const state = graph.getView().getState(graph.getSelectionCell());

        if (state != null) {
          ff = state.style[mxConstants.STYLE_FONTFAMILY] || ff;
          fs = state.style[mxConstants.STYLE_FONTSIZE] || fs;

          if (ff.length > 10) {
            ff = ff.substring(0, 8) + "...";
          }
        }

        this.toolbar.setFontName(ff);
        this.toolbar.setFontSize(fs);
      });

      graph.getSelectionModel().addListener(mxEvent.CHANGE, update);
      graph.getModel().addListener(mxEvent.CHANGE, update);
    }

    // Makes sure the current layer is visible when cells are added
    graph.addListener(mxEvent.CELLS_ADDED, function (sender, evt) {
      const cells = evt.getProperty("cells");
      const parent = evt.getProperty("parent");

      if (
        graph.getModel().isLayer(parent) &&
        !graph.isCellVisible(parent) &&
        cells != null &&
        cells.length > 0
      ) {
        graph.getModel().setVisible(parent, true);
      }
    });

    // Global handler to hide the current menu
    this.gestureHandler = mxUtils.bind(this, function (evt) {
      if (this.currentMenu != null && mxEvent.getSource(evt) != this.currentMenu.div) {
        this.hideCurrentMenu();
      }
    });

    mxEvent.addGestureListeners(document, this.gestureHandler);

    // Updates the editor UI after the window has been resized or the orientation changes
    // Timeout is workaround for old IE versions which have a delay for DOM client sizes.
    // Should not use delay > 0 to avoid handle multiple repaints during window resize
    this.resizeHandler = mxUtils.bind(this, function () {
      window.setTimeout(
        mxUtils.bind(this, function () {
          if (this.editor.graph != null) {
            this.refresh();
          }
        }),
        0
      );
    });

    mxEvent.addListener(window, "resize", this.resizeHandler);

    this.orientationChangeHandler = mxUtils.bind(this, function () {
      this.refresh();
    });

    mxEvent.addListener(window, "orientationchange", this.orientationChangeHandler);

    // Workaround for bug on iOS see
    // http://stackoverflow.com/questions/19012135/ios-7-ipad-safari-landscape-innerheight-outerheight-layout-issue
    if (mxClient.IS_IOS && !window.navigator.standalone) {
      this.scrollHandler = mxUtils.bind(this, function () {
        window.scrollTo(0, 0);
      });

      mxEvent.addListener(window, "scroll", this.scrollHandler);
    }

    /**
     * Sets the initial scrollbar locations after a file was loaded.
     */
    this.editor.addListener(
      "resetGraphView",
      mxUtils.bind(this, function () {
        this.resetScrollbars();
      })
    );

    /**
     * Repaints the grid.
     */
    this.addListener(
      "gridEnabledChanged",
      mxUtils.bind(this, function () {
        graph.view.validateBackground();
      })
    );

    this.addListener(
      "backgroundColorChanged",
      mxUtils.bind(this, function () {
        graph.view.validateBackground();
      })
    );

    /**
     * Repaints the grid.
     */
    graph.addListener(
      "gridSizeChanged",
      mxUtils.bind(this, function () {
        if (graph.isGridEnabled()) {
          graph.view.validateBackground();
        }
      })
    );

    // Resets UI, updates action and menu states
    this.editor.resetGraph();
  }

  this.init();

  if (!graph.standalone) {
    this.open();
  }
}

// Extends mxEventSource
mxUtils.extend(EditorUi, mxEventSource);

/**
 * Global config that specifies if the compact UI elements should be used.
 */
EditorUi.compactUi = true;

/**
 * Specifies the size of the split bar.
 */
EditorUi.prototype.splitSize = mxClient.IS_TOUCH || mxClient.IS_POINTER ? 12 : 8;

/**
 * Specifies the height of the menubar. Default is 30.
 */
EditorUi.prototype.menubarHeight = 30;

/**
 * Specifies the width of the format panel should be enabled. Default is true.
 */
EditorUi.prototype.formatEnabled = true;

/**
 * Specifies the width of the format panel. Default is 240.
 */
EditorUi.prototype.formatWidth = 240;

/**
 * Specifies the height of the toolbar. Default is 38.
 */
EditorUi.prototype.toolbarHeight = 38;

/**
 * Specifies the height of the footer. Default is 28.
 */
EditorUi.prototype.footerHeight = 28;

/**
 * Specifies the height of the optional sidebarFooterContainer. Default is 34.
 */
EditorUi.prototype.sidebarFooterHeight = 34;

/**
 * Specifies the position of the horizontal split bar. Default is 240 or 118 for
 * screen widths <= 640px.
 */
EditorUi.prototype.hsplitPosition = screen.width <= 640 ? 118 : 240;

/**
 * Specifies if animations are allowed in <executeLayout>. Default is true.
 */
EditorUi.prototype.allowAnimation = true;

/**
 * Default is 2.
 */
EditorUi.prototype.lightboxMaxFitScale = 2;

/**
 * Default is 4.
 */
EditorUi.prototype.lightboxVerticalDivider = 4;

/**
 * Specifies if single click on horizontal split should collapse sidebar. Default is false.
 */
EditorUi.prototype.hsplitClickEnabled = false;

/**
 * Installs the listeners to update the action states.
 */
EditorUi.prototype.init = function () {
  const graph = this.editor.graph;

  if (!graph.standalone) {
    // Hides tooltips and connection points when scrolling
    mxEvent.addListener(
      graph.container,
      "scroll",
      mxUtils.bind(this, function () {
        graph.tooltipHandler.hide();

        if (graph.connectionHandler != null && graph.connectionHandler.constraintHandler != null) {
          graph.connectionHandler.constraintHandler.reset();
        }
      })
    );

    // Hides tooltip on escape
    graph.addListener(
      mxEvent.ESCAPE,
      mxUtils.bind(this, function () {
        graph.tooltipHandler.hide();
        const rb = graph.getRubberband();

        if (rb != null) {
          rb.cancel();
        }
      })
    );

    mxEvent.addListener(
      graph.container,
      "keydown",
      mxUtils.bind(this, function (evt) {
        this.onKeyDown(evt);
      })
    );

    mxEvent.addListener(
      graph.container,
      "keypress",
      mxUtils.bind(this, function (evt) {
        this.onKeyPress(evt);
      })
    );

    // Updates action states
    this.addUndoListener();
    this.addBeforeUnloadListener();

    graph.getSelectionModel().addListener(
      mxEvent.CHANGE,
      mxUtils.bind(this, function () {
        this.updateActionStates();
      })
    );

    graph.getModel().addListener(
      mxEvent.CHANGE,
      mxUtils.bind(this, function () {
        this.updateActionStates();
      })
    );

    // Changes action states after change of default parent
    const graphSetDefaultParent = graph.setDefaultParent;
    const ui = this;

    this.editor.graph.setDefaultParent = function () {
      graphSetDefaultParent.apply(this, arguments);
      ui.updateActionStates();
    };

    this.updateActionStates();
    this.initClipboard();
    this.initCanvas();

    if (this.format != null) {
      this.format.init();
    }
  }
};

/**
 * Returns true if the given event should start editing. This implementation returns true.
 */
EditorUi.prototype.onKeyDown = function (evt) {
  const graph = this.editor.graph;

  // Tab selects next cell
  if (
    evt.which == 9 &&
    graph.isEnabled() &&
    !mxEvent.isAltDown(evt) &&
    (!graph.isEditing() || !mxEvent.isShiftDown(evt))
  ) {
    if (graph.isEditing()) {
      graph.stopEditing(false);
    } else {
      graph.selectCell(!mxEvent.isShiftDown(evt));
    }

    mxEvent.consume(evt);
  }
};

/**
 * Returns true if the given event should start editing. This implementation returns true.
 */
EditorUi.prototype.onKeyPress = function (evt) {
  const graph = this.editor.graph;

  // KNOWN: Focus does not work if label is empty in quirks mode
  if (
    this.isImmediateEditingEvent(evt) &&
    !graph.isEditing() &&
    !graph.isSelectionEmpty() &&
    evt.which !== 0 &&
    evt.which !== 27 &&
    !mxEvent.isAltDown(evt) &&
    !mxEvent.isControlDown(evt) &&
    !mxEvent.isMetaDown(evt)
  ) {
    graph.escape();
    graph.startEditing();

    // Workaround for FF where char is lost if cursor is placed before char
    if (mxClient.IS_FF) {
      const ce = graph.cellEditor;

      if (ce.textarea != null) {
        ce.textarea.innerHTML = String.fromCharCode(evt.which);

        // Moves cursor to end of textarea
        const range = document.createRange();
        range.selectNodeContents(ce.textarea);
        range.collapse(false);
        const sel = window.getSelection();
        sel.removeAllRanges();
        sel.addRange(range);
      }
    }
  }
};

/**
 * Returns true if the given event should start editing. This implementation returns true.
 */
EditorUi.prototype.isImmediateEditingEvent = function () {
  return true;
};

/**
 * Private helper method.
 */
EditorUi.prototype.getCssClassForMarker = function (prefix, shape, marker, fill) {
  let result = "";

  if (shape == "flexArrow") {
    result =
      marker != null && marker != mxConstants.NONE
        ? "geSprite geSprite-" + prefix + "blocktrans"
        : "geSprite geSprite-noarrow";
  } else {
    // SVG marker sprites
    if (marker == "box" || marker == "halfCircle") {
      result = "geSprite geSvgSprite geSprite-" + marker + (prefix == "end" ? " geFlipSprite" : "");
    } else if (marker == mxConstants.ARROW_CLASSIC) {
      result =
        fill == "1"
          ? "geSprite geSprite-" + prefix + "classic"
          : "geSprite geSprite-" + prefix + "classictrans";
    } else if (marker == mxConstants.ARROW_CLASSIC_THIN) {
      result =
        fill == "1"
          ? "geSprite geSprite-" + prefix + "classicthin"
          : "geSprite geSprite-" + prefix + "classicthintrans";
    } else if (marker == mxConstants.ARROW_OPEN) {
      result = "geSprite geSprite-" + prefix + "open";
    } else if (marker == mxConstants.ARROW_OPEN_THIN) {
      result = "geSprite geSprite-" + prefix + "openthin";
    } else if (marker == mxConstants.ARROW_BLOCK) {
      result =
        fill == "1"
          ? "geSprite geSprite-" + prefix + "block"
          : "geSprite geSprite-" + prefix + "blocktrans";
    } else if (marker == mxConstants.ARROW_BLOCK_THIN) {
      result =
        fill == "1"
          ? "geSprite geSprite-" + prefix + "blockthin"
          : "geSprite geSprite-" + prefix + "blockthintrans";
    } else if (marker == mxConstants.ARROW_OVAL) {
      result =
        fill == "1"
          ? "geSprite geSprite-" + prefix + "oval"
          : "geSprite geSprite-" + prefix + "ovaltrans";
    } else if (marker == mxConstants.ARROW_DIAMOND) {
      result =
        fill == "1"
          ? "geSprite geSprite-" + prefix + "diamond"
          : "geSprite geSprite-" + prefix + "diamondtrans";
    } else if (marker == mxConstants.ARROW_DIAMOND_THIN) {
      result =
        fill == "1"
          ? "geSprite geSprite-" + prefix + "thindiamond"
          : "geSprite geSprite-" + prefix + "thindiamondtrans";
    } else if (marker == "openAsync") {
      result = "geSprite geSprite-" + prefix + "openasync";
    } else if (marker == "dash") {
      result = "geSprite geSprite-" + prefix + "dash";
    } else if (marker == "cross") {
      result = "geSprite geSprite-" + prefix + "cross";
    } else if (marker == "async") {
      result =
        fill == "1"
          ? "geSprite geSprite-" + prefix + "async"
          : "geSprite geSprite-" + prefix + "asynctrans";
    } else if (marker == "circle" || marker == "circlePlus") {
      result =
        fill == "1" || marker == "circle"
          ? "geSprite geSprite-" + prefix + "circle"
          : "geSprite geSprite-" + prefix + "circleplus";
    } else if (marker == "ERone") {
      result = "geSprite geSprite-" + prefix + "erone";
    } else if (marker == "ERmandOne") {
      result = "geSprite geSprite-" + prefix + "eronetoone";
    } else if (marker == "ERmany") {
      result = "geSprite geSprite-" + prefix + "ermany";
    } else if (marker == "ERoneToMany") {
      result = "geSprite geSprite-" + prefix + "eronetomany";
    } else if (marker == "ERzeroToOne") {
      result = "geSprite geSprite-" + prefix + "eroneopt";
    } else if (marker == "ERzeroToMany") {
      result = "geSprite geSprite-" + prefix + "ermanyopt";
    } else {
      result = "geSprite geSprite-noarrow";
    }
  }

  return result;
};

/**
 * "Installs" menus in EditorUi.
 */
EditorUi.prototype.createMenus = function () {
  return new Menus(this);
};

/**
 * Hook for allowing selection and context menu for certain events.
 */
EditorUi.prototype.updatePasteActionStates = function () {
  const graph = this.editor.graph;
  const paste = this.actions.get("paste");
  const pasteHere = this.actions.get("pasteHere");

  paste.setEnabled(
    this.editor.graph.cellEditor.isContentEditing() ||
      (!mxClipboard.isEmpty() && graph.isEnabled() && !graph.isCellLocked(graph.getDefaultParent()))
  );
  pasteHere.setEnabled(paste.isEnabled());
};

/**
 * Hook for allowing selection and context menu for certain events.
 */
EditorUi.prototype.initClipboard = function () {
  const ui = this;

  const mxClipboardCut = mxClipboard.cut;
  mxClipboard.cut = function (graph) {
    if (graph.cellEditor.isContentEditing()) {
      document.execCommand("cut", false, null);
    } else {
      mxClipboardCut.apply(this, arguments);
    }

    ui.updatePasteActionStates();
  };

  mxClipboard.copy = function (graph) {
    let result = null;

    if (graph.cellEditor.isContentEditing()) {
      document.execCommand("copy", false, null);
    } else {
      result = result || graph.getSelectionCells();
      result = graph.getExportableCells(graph.model.getTopmostCells(result));

      const cloneMap = new Object();
      const lookup = graph.createCellLookup(result);
      const clones = graph.cloneCells(result, null, cloneMap);

      // Uses temporary model to force new IDs to be assigned
      // to avoid having to carry over the mapping from object
      // ID to cell ID to the paste operation
      const model = new mxGraphModel();
      const parent = model.getChildAt(model.getRoot(), 0);

      for (let i = 0; i < clones.length; i++) {
        model.add(parent, clones[i]);

        // Checks for orphaned relative children and makes absolute
        const state = graph.view.getState(result[i]);

        if (state != null) {
          const geo = graph.getCellGeometry(clones[i]);

          if (
            geo != null &&
            geo.relative &&
            !model.isEdge(result[i]) &&
            lookup[mxObjectIdentity.get(model.getParent(result[i]))] == null
          ) {
            geo.offset = null;
            geo.relative = false;
            geo.x = state.x / state.view.scale - state.view.translate.x;
            geo.y = state.y / state.view.scale - state.view.translate.y;
          }
        }
      }

      graph.updateCustomLinks(graph.createCellMapping(cloneMap, lookup), clones);

      mxClipboard.insertCount = 1;
      mxClipboard.setCells(clones);
    }

    ui.updatePasteActionStates();

    return result;
  };

  const mxClipboardPaste = mxClipboard.paste;
  mxClipboard.paste = function (graph) {
    let result = null;

    if (graph.cellEditor.isContentEditing()) {
      document.execCommand("paste", false, null);
    } else {
      result = mxClipboardPaste.apply(this, arguments);
    }

    ui.updatePasteActionStates();

    return result;
  };

  // Overrides cell editor to update paste action state
  const cellEditorStartEditing = this.editor.graph.cellEditor.startEditing;

  this.editor.graph.cellEditor.startEditing = function () {
    cellEditorStartEditing.apply(this, arguments);
    ui.updatePasteActionStates();
  };

  const cellEditorStopEditing = this.editor.graph.cellEditor.stopEditing;

  this.editor.graph.cellEditor.stopEditing = function () {
    cellEditorStopEditing.apply(this, arguments);
    ui.updatePasteActionStates();
  };

  this.updatePasteActionStates();
};

/**
 * Delay between zoom steps when not using preview.
 */
EditorUi.prototype.lazyZoomDelay = 20;

/**
 * Delay before update of DOM when using preview.
 */
EditorUi.prototype.wheelZoomDelay = 400;

/**
 * Delay before update of DOM when using preview.
 */
EditorUi.prototype.buttonZoomDelay = 600;

/**
 * Initializes the infinite canvas.
 */
EditorUi.prototype.initCanvas = function () {
  // Initial page layout view, scrollBuffer and timer-based scrolling
  const graph = this.editor.graph;
  graph.timerAutoScroll = true;

  /**
   * Returns the padding for pages in page view with scrollbars.
   */
  graph.getPagePadding = function () {
    return new mxPoint(
      Math.max(0, Math.round((graph.container.offsetWidth - 34) / graph.view.scale)),
      Math.max(0, Math.round((graph.container.offsetHeight - 34) / graph.view.scale))
    );
  };

  // Fits the number of background pages to the graph
  graph.view.getBackgroundPageBounds = function () {
    const layout = this.graph.getPageLayout();
    const page = this.graph.getPageSize();

    return new mxRectangle(
      this.scale * (this.translate.x + layout.x * page.width),
      this.scale * (this.translate.y + layout.y * page.height),
      this.scale * layout.width * page.width,
      this.scale * layout.height * page.height
    );
  };

  graph.getPreferredPageSize = function () {
    const pages = this.getPageLayout();
    const size = this.getPageSize();

    return new mxRectangle(0, 0, pages.width * size.width, pages.height * size.height);
  };

  // Scales pages/graph to fit available size
  let resize = null;
  const ui = this;

  if (this.editor.isChromelessView()) {
    resize = mxUtils.bind(this, function (autoscale, maxScale, cx, cy) {
      if (graph.container != null && !graph.isViewer()) {
        cx = cx != null ? cx : 0;
        cy = cy != null ? cy : 0;

        const bds = graph.pageVisible
          ? graph.view.getBackgroundPageBounds()
          : graph.getGraphBounds();
        const scroll = mxUtils.hasScrollbars(graph.container);
        const tr = graph.view.translate;
        const s = graph.view.scale;

        // Normalizes the bounds
        const b = mxRectangle.fromRectangle(bds);
        b.x = b.x / s - tr.x;
        b.y = b.y / s - tr.y;
        b.width /= s;
        b.height /= s;

        const st = graph.container.scrollTop;
        const sl = graph.container.scrollLeft;
        let sb = mxClient.IS_QUIRKS || document.documentMode >= 8 ? 20 : 14;

        if (document.documentMode == 8 || document.documentMode == 9) {
          sb += 3;
        }

        const cw = graph.container.offsetWidth - sb;
        const ch = graph.container.offsetHeight - sb;

        const ns = autoscale ? Math.max(0.3, Math.min(maxScale || 1, cw / b.width)) : s;
        let dx = (cw - ns * b.width) / 2 / ns;
        let dy =
          this.lightboxVerticalDivider == 0
            ? 0
            : (ch - ns * b.height) / this.lightboxVerticalDivider / ns;

        if (scroll) {
          dx = Math.max(dx, 0);
          dy = Math.max(dy, 0);
        }

        if (scroll || bds.width < cw || bds.height < ch) {
          graph.view.scaleAndTranslate(ns, Math.floor(dx - b.x), Math.floor(dy - b.y));
          graph.container.scrollTop = (st * ns) / s;
          graph.container.scrollLeft = (sl * ns) / s;
        } else if (cx != 0 || cy != 0) {
          const t = graph.view.translate;
          graph.view.setTranslate(Math.floor(t.x + cx / s), Math.floor(t.y + cy / s));
        }
      }
    });

    // Hack to make function available to subclassers
    this.chromelessResize = resize;

    // Hook for subclassers for override
    this.chromelessWindowResize = mxUtils.bind(this, function () {
      this.chromelessResize(false);
    });

    // Removable resize listener
    const autoscaleResize = mxUtils.bind(this, function () {
      this.chromelessWindowResize(false);
    });

    mxEvent.addListener(window, "resize", autoscaleResize);

    this.destroyFunctions.push(function () {
      mxEvent.removeListener(window, "resize", autoscaleResize);
    });

    this.editor.addListener(
      "resetGraphView",
      mxUtils.bind(this, function () {
        this.chromelessResize(true);
      })
    );

    this.actions.get("zoomIn").funct = mxUtils.bind(this, function () {
      graph.zoomIn();
      this.chromelessResize(false);
    });
    this.actions.get("zoomOut").funct = mxUtils.bind(this, function () {
      graph.zoomOut();
      this.chromelessResize(false);
    });

    // Creates toolbar for viewer - do not use CSS here
    // as this may be used in a viewer that has no CSS
    this.chromelessToolbar = document.createElement("div");
    this.chromelessToolbar.style.position = "fixed";
    this.chromelessToolbar.style.overflow = "hidden";
    this.chromelessToolbar.style.boxSizing = "border-box";
    this.chromelessToolbar.style.whiteSpace = "nowrap";
    this.chromelessToolbar.style.backgroundColor = "#000000";
    this.chromelessToolbar.style.padding = "10px 10px 8px 10px";
    this.chromelessToolbar.style.left = graph.isViewer() ? "0" : "50%";

    if (!mxClient.IS_VML) {
      mxUtils.setPrefixedStyle(this.chromelessToolbar.style, "borderRadius", "20px");
      mxUtils.setPrefixedStyle(
        this.chromelessToolbar.style,
        "transition",
        "opacity 600ms ease-in-out"
      );
    }

    const updateChromelessToolbarPosition = mxUtils.bind(this, function () {
      const css = mxUtils.getCurrentStyle(graph.container);

      if (graph.isViewer()) {
        this.chromelessToolbar.style.top = "0";
      } else {
        this.chromelessToolbar.style.bottom =
          (css != null ? parseInt(css["margin-bottom"] || 0) : 0) +
          (this.tabContainer != null ? 20 + parseInt(this.tabContainer.style.height) : 20) +
          "px";
      }
    });

    this.editor.addListener("resetGraphView", updateChromelessToolbarPosition);
    updateChromelessToolbarPosition();

    const addButton = mxUtils.bind(this, function (fn, imgSrc, tip) {
      const a = document.createElement("span");
      a.style.paddingLeft = "8px";
      a.style.paddingRight = "8px";
      a.style.cursor = "pointer";
      mxEvent.addListener(a, "click", fn);

      if (tip != null) {
        a.setAttribute("title", tip);
      }

      const img = document.createElement("img");
      img.setAttribute("border", "0");
      img.setAttribute("src", imgSrc);

      a.appendChild(img);
      this.chromelessToolbar.appendChild(a);

      return a;
    });

    const prevButton = addButton(
      mxUtils.bind(this, function (evt) {
        this.actions.get("previousPage").funct();
        mxEvent.consume(evt);
      }),
      Editor.previousLargeImage,
      mxResources.get("previousPage")
    );

    const pageInfo = document.createElement("div");
    pageInfo.style.display = "inline-block";
    pageInfo.style.verticalAlign = "top";
    pageInfo.style.fontFamily = "Helvetica,Arial";
    pageInfo.style.marginTop = "8px";
    pageInfo.style.fontSize = "14px";
    pageInfo.style.color = "#ffffff";
    this.chromelessToolbar.appendChild(pageInfo);

    const nextButton = addButton(
      mxUtils.bind(this, function (evt) {
        this.actions.get("nextPage").funct();
        mxEvent.consume(evt);
      }),
      Editor.nextLargeImage,
      mxResources.get("nextPage")
    );

    const updatePageInfo = mxUtils.bind(this, function () {
      if (this.pages != null && this.pages.length > 1 && this.currentPage != null) {
        pageInfo.innerHTML = "";
        mxUtils.write(
          pageInfo,
          mxUtils.indexOf(this.pages, this.currentPage) + 1 + " / " + this.pages.length
        );
      }
    });

    prevButton.style.paddingLeft = "0px";
    prevButton.style.paddingRight = "4px";
    nextButton.style.paddingLeft = "4px";
    nextButton.style.paddingRight = "0px";

    const updatePageButtons = mxUtils.bind(this, function () {
      if (this.pages != null && this.pages.length > 1 && this.currentPage != null) {
        nextButton.style.display = "";
        prevButton.style.display = "";
        pageInfo.style.display = "inline-block";
      } else {
        nextButton.style.display = "none";
        prevButton.style.display = "none";
        pageInfo.style.display = "none";
      }

      updatePageInfo();
    });

    this.editor.addListener("resetGraphView", updatePageButtons);
    this.editor.addListener("pageSelected", updatePageInfo);

    addButton(
      mxUtils.bind(this, function (evt) {
        this.actions.get("zoomOut").funct();
        mxEvent.consume(evt);
      }),
      Editor.zoomOutLargeImage,
      mxResources.get("zoomOut") + " (Alt+Mousewheel)"
    );

    addButton(
      mxUtils.bind(this, function (evt) {
        this.actions.get("zoomIn").funct();
        mxEvent.consume(evt);
      }),
      Editor.zoomInLargeImage,
      mxResources.get("zoomIn") + " (Alt+Mousewheel)"
    );

    addButton(
      mxUtils.bind(this, function (evt) {
        if (graph.isLightboxView()) {
          if (graph.view.scale == 1) {
            this.lightboxFit();
          } else {
            graph.zoomTo(1);
          }

          this.chromelessResize(false);
        } else {
          this.chromelessResize(true);
        }

        mxEvent.consume(evt);
      }),
      Editor.actualSizeLargeImage,
      mxResources.get("fit")
    );

    // Changes toolbar opacity on hover
    let fadeThread = null;
    let fadeThread2 = null;

    const fadeOut = mxUtils.bind(this, function (delay) {
      if (fadeThread != null) {
        window.clearTimeout(fadeThread);
        fadeThread = null;
      }

      if (fadeThread2 != null) {
        window.clearTimeout(fadeThread2);
        fadeThread2 = null;
      }

      fadeThread = window.setTimeout(
        mxUtils.bind(this, function () {
          mxUtils.setOpacity(this.chromelessToolbar, 0);
          fadeThread = null;

          fadeThread2 = window.setTimeout(
            mxUtils.bind(this, function () {
              this.chromelessToolbar.style.display = "none";
              fadeThread2 = null;
            }),
            600
          );
        }),
        delay || 200
      );
    });

    const fadeIn = mxUtils.bind(this, function (opacity) {
      if (fadeThread != null) {
        window.clearTimeout(fadeThread);
        fadeThread = null;
      }

      if (fadeThread2 != null) {
        window.clearTimeout(fadeThread2);
        fadeThread2 = null;
      }

      this.chromelessToolbar.style.display = "";
      mxUtils.setOpacity(this.chromelessToolbar, opacity || 30);
    });

    this.addChromelessToolbarItems(addButton);

    if (this.editor.editButtonLink != null || this.editor.editButtonFunc != null) {
      addButton(
        mxUtils.bind(this, function (evt) {
          if (this.editor.editButtonFunc != null) {
            this.editor.editButtonFunc();
          } else if (this.editor.editButtonLink == "_blank") {
            this.editor.editAsNew(this.getEditBlankXml());
          } else {
            graph.openLink(this.editor.editButtonLink, "editWindow");
          }

          mxEvent.consume(evt);
        }),
        Editor.editLargeImage,
        mxResources.get("edit")
      );
    }

    if (this.lightboxToolbarActions != null) {
      for (let i = 0; i < this.lightboxToolbarActions.length; i++) {
        const lbAction = this.lightboxToolbarActions[i];
        addButton(lbAction.fn, lbAction.icon, lbAction.tooltip);
      }
    }

    // Initial state invisible
    this.chromelessToolbar.style.display = "none";

    if (!graph.isViewer()) {
      mxUtils.setPrefixedStyle(this.chromelessToolbar.style, "transform", "translate(-50%,0)");
    }

    graph.container.appendChild(this.chromelessToolbar);

    mxEvent.addListener(
      graph.container,
      mxClient.IS_POINTER ? "pointermove" : "mousemove",
      mxUtils.bind(this, function (evt) {
        if (!mxEvent.isTouchEvent(evt)) {
          if (!mxEvent.isShiftDown(evt)) {
            fadeIn(30);
          }

          fadeOut();
        }
      })
    );

    mxEvent.addListener(
      this.chromelessToolbar,
      mxClient.IS_POINTER ? "pointermove" : "mousemove",
      function (evt) {
        mxEvent.consume(evt);
      }
    );

    mxEvent.addListener(
      this.chromelessToolbar,
      "mouseenter",
      mxUtils.bind(this, function (evt) {
        if (!mxEvent.isShiftDown(evt)) {
          fadeIn(100);
        } else {
          fadeOut();
        }
      })
    );

    mxEvent.addListener(
      this.chromelessToolbar,
      "mousemove",
      mxUtils.bind(this, function (evt) {
        if (!mxEvent.isShiftDown(evt)) {
          fadeIn(100);
        } else {
          fadeOut();
        }

        mxEvent.consume(evt);
      })
    );

    mxEvent.addListener(
      this.chromelessToolbar,
      "mouseleave",
      mxUtils.bind(this, function (evt) {
        if (!mxEvent.isTouchEvent(evt)) {
          fadeIn(30);
        }
      })
    );

    // Shows/hides toolbar for touch devices
    const tol = graph.getTolerance();

    graph.addMouseListener({
      startX: 0,
      startY: 0,
      scrollLeft: 0,
      scrollTop: 0,
      mouseDown: function (sender, me) {
        this.startX = me.getGraphX();
        this.startY = me.getGraphY();
        this.scrollLeft = graph.container.scrollLeft;
        this.scrollTop = graph.container.scrollTop;
      },
      mouseMove: function () {},
      mouseUp: function (sender, me) {
        if (mxEvent.isTouchEvent(me.getEvent())) {
          if (
            Math.abs(this.scrollLeft - graph.container.scrollLeft) < tol &&
            Math.abs(this.scrollTop - graph.container.scrollTop) < tol &&
            Math.abs(this.startX - me.getGraphX()) < tol &&
            Math.abs(this.startY - me.getGraphY()) < tol
          ) {
            if (parseFloat(ui.chromelessToolbar.style.opacity || 0) > 0) {
              fadeOut();
            } else {
              fadeIn(30);
            }
          }
        }
      },
    });
  } else if (this.editor.extendCanvas) {
    /**
     * Guesses autoTranslate to avoid another repaint (see below).
     * Works if only the scale of the graph changes or if pages
     * are visible and the visible pages do not change.
     */
    const graphViewValidate = graph.view.validate;
    graph.view.validate = function () {
      if (this.graph.container != null && mxUtils.hasScrollbars(this.graph.container)) {
        const pad = this.graph.getPagePadding();
        const size = this.graph.getPageSize();

        // Updating scrollbars here causes flickering in quirks and is not needed
        // if zoom method is always used to set the current scale on the graph.
        this.translate.x = pad.x - (this.x0 || 0) * size.width;
        this.translate.y = pad.y - (this.y0 || 0) * size.height;
      }

      graphViewValidate.apply(this, arguments);
    };

    if (!graph.isViewer()) {
      const graphSizeDidChange = graph.sizeDidChange;

      graph.sizeDidChange = function () {
        if (this.container != null && mxUtils.hasScrollbars(this.container)) {
          const pages = this.getPageLayout();
          const pad = this.getPagePadding();
          const size = this.getPageSize();

          // Updates the minimum graph size
          const minw = Math.ceil(2 * pad.x + pages.width * size.width);
          const minh = Math.ceil(2 * pad.y + pages.height * size.height);

          const min = graph.minimumGraphSize;

          // LATER: Fix flicker of scrollbar size in IE quirks mode
          // after delayed call in window.resize event handler
          if (min == null || min.width != minw || min.height != minh) {
            graph.minimumGraphSize = new mxRectangle(0, 0, minw, minh);
          }

          // Updates auto-translate to include padding and graph size
          const dx = pad.x - pages.x * size.width;
          const dy = pad.y - pages.y * size.height;

          if (!this.autoTranslate && (this.view.translate.x != dx || this.view.translate.y != dy)) {
            this.autoTranslate = true;
            this.view.x0 = pages.x;
            this.view.y0 = pages.y;

            // NOTE: THIS INVOKES THIS METHOD AGAIN. UNFORTUNATELY THERE IS NO WAY AROUND THIS SINCE THE
            // BOUNDS ARE KNOWN AFTER THE VALIDATION AND SETTING THE TRANSLATE TRIGGERS A REVALIDATION.
            // SHOULD MOVE TRANSLATE/SCALE TO VIEW.
            const tx = graph.view.translate.x;
            const ty = graph.view.translate.y;
            graph.view.setTranslate(dx, dy);

            // LATER: Fix rounding errors for small zoom
            graph.container.scrollLeft += Math.round((dx - tx) * graph.view.scale);
            graph.container.scrollTop += Math.round((dy - ty) * graph.view.scale);

            this.autoTranslate = false;

            return;
          }

          graphSizeDidChange.apply(this, arguments);
        } else {
          // Fires event but does not invoke superclass
          this.fireEvent(new mxEventObject(mxEvent.SIZE, "bounds", this.getGraphBounds()));
        }
      };
    }
  }

  // Accumulates the zoom factor while the rendering is taking place
  // so that not the complete sequence of zoom steps must be painted
  const bgGroup = graph.view.getBackgroundPane();
  const mainGroup = graph.view.getDrawPane();
  graph.cumulativeZoomFactor = 1;
  let updateZoomTimeout = null;
  let cursorPosition = null;
  let scrollPosition = null;
  let filter = null;

  const scheduleZoom = function (delay) {
    if (updateZoomTimeout != null) {
      window.clearTimeout(updateZoomTimeout);
    }

    window.setTimeout(function () {
      if (!graph.isMouseDown) {
        updateZoomTimeout = window.setTimeout(
          mxUtils.bind(this, function () {
            if (graph.isFastZoomEnabled()) {
              // Transforms background page
              if (
                graph.view.backgroundPageShape != null &&
                graph.view.backgroundPageShape.node != null
              ) {
                mxUtils.setPrefixedStyle(
                  graph.view.backgroundPageShape.node.style,
                  "transform-origin",
                  null
                );
                mxUtils.setPrefixedStyle(
                  graph.view.backgroundPageShape.node.style,
                  "transform",
                  null
                );
              }

              // Transforms graph and background image
              mainGroup.style.transformOrigin = "";
              bgGroup.style.transformOrigin = "";

              // Workaround for no reset of transform in Safari
              if (mxClient.IS_SF) {
                mainGroup.style.transform = "scale(1)";
                bgGroup.style.transform = "scale(1)";

                window.setTimeout(function () {
                  mainGroup.style.transform = "";
                  bgGroup.style.transform = "";
                }, 0);
              } else {
                mainGroup.style.transform = "";
                bgGroup.style.transform = "";
              }

              // Shows interactive elements
              graph.view.getDecoratorPane().style.opacity = "";
              graph.view.getOverlayPane().style.opacity = "";
            }

            const sp = new mxPoint(graph.container.scrollLeft, graph.container.scrollTop);
            const offset = mxUtils.getOffset(graph.container);
            const prev = graph.view.scale;
            let dx = 0;
            let dy = 0;

            if (cursorPosition != null) {
              dx = graph.container.offsetWidth / 2 - cursorPosition.x + offset.x;
              dy = graph.container.offsetHeight / 2 - cursorPosition.y + offset.y;
            }

            graph.zoom(graph.cumulativeZoomFactor);
            const s = graph.view.scale;

            if (s != prev) {
              if (scrollPosition != null) {
                dx += sp.x - scrollPosition.x;
                dy += sp.y - scrollPosition.y;
              }

              if (resize != null) {
                ui.chromelessResize(
                  false,
                  null,
                  dx * (graph.cumulativeZoomFactor - 1),
                  dy * (graph.cumulativeZoomFactor - 1)
                );
              }

              if (mxUtils.hasScrollbars(graph.container) && (dx != 0 || dy != 0)) {
                graph.container.scrollLeft -= dx * (graph.cumulativeZoomFactor - 1);
                graph.container.scrollTop -= dy * (graph.cumulativeZoomFactor - 1);
              }
            }

            if (filter != null) {
              mainGroup.setAttribute("filter", filter);
            }

            graph.cumulativeZoomFactor = 1;
            updateZoomTimeout = null;
            scrollPosition = null;
            cursorPosition = null;
            filter = null;
          }),
          delay != null ? delay : graph.isFastZoomEnabled() ? ui.wheelZoomDelay : ui.lazyZoomDelay
        );
      }
    }, 0);
  };

  graph.lazyZoom = function (zoomIn, ignoreCursorPosition, delay) {
    // TODO: Fix ignored cursor position if scrollbars are disabled
    ignoreCursorPosition = ignoreCursorPosition || !graph.scrollbars;

    if (ignoreCursorPosition) {
      cursorPosition = new mxPoint(
        graph.container.offsetLeft + graph.container.clientWidth / 2,
        graph.container.offsetTop + graph.container.clientHeight / 2
      );
    }

    // Switches to 5% zoom steps below 15%
    if (zoomIn) {
      if (this.view.scale * this.cumulativeZoomFactor <= 0.15) {
        this.cumulativeZoomFactor *= (this.view.scale + 0.05) / this.view.scale;
      } else {
        // Uses to 5% zoom steps for better grid rendering in webkit
        // and to avoid rounding errors for zoom steps
        this.cumulativeZoomFactor *= this.zoomFactor;
        this.cumulativeZoomFactor =
          Math.round(this.view.scale * this.cumulativeZoomFactor * 20) / 20 / this.view.scale;
      }
    } else {
      if (this.view.scale * this.cumulativeZoomFactor <= 0.15) {
        this.cumulativeZoomFactor *= (this.view.scale - 0.05) / this.view.scale;
      } else {
        // Uses to 5% zoom steps for better grid rendering in webkit
        // and to avoid rounding errors for zoom steps
        this.cumulativeZoomFactor /= this.zoomFactor;
        this.cumulativeZoomFactor =
          Math.round(this.view.scale * this.cumulativeZoomFactor * 20) / 20 / this.view.scale;
      }
    }

    this.cumulativeZoomFactor =
      Math.max(0.05, Math.min(this.view.scale * this.cumulativeZoomFactor, 160)) / this.view.scale;

    if (graph.isFastZoomEnabled()) {
      if (filter == null && mainGroup.getAttribute("filter") != "") {
        filter = mainGroup.getAttribute("filter");
        mainGroup.removeAttribute("filter");
      }

      scrollPosition = new mxPoint(graph.container.scrollLeft, graph.container.scrollTop);

      const cx = ignoreCursorPosition
        ? graph.container.scrollLeft + graph.container.clientWidth / 2
        : cursorPosition.x + graph.container.scrollLeft - graph.container.offsetLeft;
      const cy = ignoreCursorPosition
        ? graph.container.scrollTop + graph.container.clientHeight / 2
        : cursorPosition.y + graph.container.scrollTop - graph.container.offsetTop;
      mainGroup.style.transformOrigin = cx + "px " + cy + "px";
      mainGroup.style.transform = "scale(" + this.cumulativeZoomFactor + ")";
      bgGroup.style.transformOrigin = cx + "px " + cy + "px";
      bgGroup.style.transform = "scale(" + this.cumulativeZoomFactor + ")";

      if (graph.view.backgroundPageShape != null && graph.view.backgroundPageShape.node != null) {
        const page = graph.view.backgroundPageShape.node;

        mxUtils.setPrefixedStyle(
          page.style,
          "transform-origin",
          (ignoreCursorPosition
            ? graph.container.clientWidth / 2 + graph.container.scrollLeft - page.offsetLeft + "px"
            : cursorPosition.x +
              graph.container.scrollLeft -
              page.offsetLeft -
              graph.container.offsetLeft +
              "px") +
            " " +
            (ignoreCursorPosition
              ? graph.container.clientHeight / 2 + graph.container.scrollTop - page.offsetTop + "px"
              : cursorPosition.y +
                graph.container.scrollTop -
                page.offsetTop -
                graph.container.offsetTop +
                "px")
        );
        mxUtils.setPrefixedStyle(
          page.style,
          "transform",
          "scale(" + this.cumulativeZoomFactor + ")"
        );
      }

      graph.view.getDecoratorPane().style.opacity = "0";
      graph.view.getOverlayPane().style.opacity = "0";

      if (ui.hoverIcons != null) {
        ui.hoverIcons.reset();
      }
    }

    scheduleZoom(delay);
  };

  // Holds back repaint until after mouse gestures
  mxEvent.addGestureListeners(
    graph.container,
    function () {
      if (updateZoomTimeout != null) {
        window.clearTimeout(updateZoomTimeout);
      }
    },
    null,
    function () {
      if (graph.cumulativeZoomFactor != 1) {
        scheduleZoom(0);
      }
    }
  );

  // Holds back repaint until scroll ends
  mxEvent.addListener(graph.container, "scroll", function () {
    if (updateZoomTimeout && !graph.isMouseDown && graph.cumulativeZoomFactor != 1) {
      scheduleZoom(0);
    }
  });

  mxEvent.addMouseWheelListener(
    mxUtils.bind(this, function (evt, up, force) {
      if (this.dialogs == null || this.dialogs.length == 0) {
        // Scrolls with scrollbars turned off
        if (!graph.scrollbars && graph.isScrollWheelEvent(evt)) {
          const t = graph.view.getTranslate();
          const step = 40 / graph.view.scale;

          if (!mxEvent.isShiftDown(evt)) {
            graph.view.setTranslate(t.x, t.y + (up ? step : -step));
          } else {
            graph.view.setTranslate(t.x + (up ? -step : step), t.y);
          }
        } else if (force || graph.isZoomWheelEvent(evt)) {
          let source = mxEvent.getSource(evt);

          while (source != null) {
            if (source == graph.container) {
              graph.tooltipHandler.hideTooltip();
              cursorPosition = new mxPoint(mxEvent.getClientX(evt), mxEvent.getClientY(evt));
              graph.lazyZoom(up);
              mxEvent.consume(evt);

              return false;
            }

            source = source.parentNode;
          }
        }
      }
    }),
    graph.container
  );

  // Uses fast zoom for pinch gestures on iOS
  graph.panningHandler.zoomGraph = function (evt) {
    graph.cumulativeZoomFactor = evt.scale;
    graph.lazyZoom(evt.scale > 0, true);
    mxEvent.consume(evt);
  };
};

/**
 * Creates a temporary graph instance for rendering off-screen content.
 */
EditorUi.prototype.addChromelessToolbarItems = function (addButton) {
  addButton(
    mxUtils.bind(this, function (evt) {
      this.actions.get("print").funct();
      mxEvent.consume(evt);
    }),
    Editor.printLargeImage,
    mxResources.get("print")
  );
};

/**
 * Creates a temporary graph instance for rendering off-screen content.
 */
EditorUi.prototype.createTemporaryGraph = function (stylesheet) {
  const graph = new Graph(document.createElement("div"), null, null, stylesheet);
  graph.resetViewOnRootChange = false;
  graph.setConnectable(false);
  graph.gridEnabled = false;
  graph.autoScroll = false;
  graph.setTooltips(false);
  graph.setEnabled(false);

  // Container must be in the DOM for correct HTML rendering
  graph.container.style.visibility = "hidden";
  graph.container.style.position = "absolute";
  graph.container.style.overflow = "hidden";
  graph.container.style.height = "1px";
  graph.container.style.width = "1px";

  return graph;
};

/**
 *
 */
EditorUi.prototype.toggleFormatPanel = function (visible) {
  visible = visible != null ? visible : this.formatWidth == 0;

  if (this.format != null) {
    this.formatWidth = visible ? 240 : 0;
    this.formatContainer.style.display = visible ? "" : "none";
    this.refresh();
    this.format.refresh();
    this.fireEvent(new mxEventObject("formatWidthChanged"));
  }
};

/**
 * Adds support for placeholders in labels.
 */
EditorUi.prototype.lightboxFit = function (maxHeight) {
  if (this.isDiagramEmpty()) {
    this.editor.graph.view.setScale(1);
  } else {
    const border = 60;

    // LATER: Use initial graph bounds to avoid rounding errors
    this.editor.graph.maxFitScale = this.lightboxMaxFitScale;
    this.editor.graph.fit(border, null, null, null, null, null, maxHeight);
    this.editor.graph.maxFitScale = null;
  }
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
EditorUi.prototype.isDiagramEmpty = function () {
  const model = this.editor.graph.getModel();

  return (
    model.getChildCount(model.root) == 1 &&
    model.getChildCount(model.getChildAt(model.root, 0)) == 0
  );
};

/**
 * Hook for allowing selection and context menu for certain events.
 */
EditorUi.prototype.isSelectionAllowed = function (evt) {
  return (
    mxEvent.getSource(evt).nodeName == "SELECT" ||
    (mxEvent.getSource(evt).nodeName == "INPUT" &&
      mxUtils.isAncestorNode(this.formatContainer, mxEvent.getSource(evt)))
  );
};

/**
 * Installs dialog if browser window is closed without saving
 * This must be disabled during save and image export.
 */
EditorUi.prototype.addBeforeUnloadListener = function () {
  // Installs dialog if browser window is closed without saving
  // This must be disabled during save and image export
  window.onbeforeunload = mxUtils.bind(this, function () {
    if (!this.editor.isChromelessView()) {
      return this.onBeforeUnload();
    }
  });
};

/**
 * Sets the onbeforeunload for the application
 */
EditorUi.prototype.onBeforeUnload = function () {
  if (this.editor.modified) {
    return mxResources.get("allChangesLost");
  }
};

/**
 * Opens the current diagram via the window.opener if one exists.
 */
EditorUi.prototype.open = function () {
  // Cross-domain window access is not allowed in FF, so if we
  // were opened from another domain then this will fail.
  try {
    if (window.opener != null && window.opener.openFile != null) {
      window.opener.openFile.setConsumer(
        mxUtils.bind(this, function (xml, filename) {
          try {
            const doc = mxUtils.parseXml(xml);
            this.editor.setGraphXml(doc.documentElement);
            this.editor.setModified(false);
            this.editor.undoManager.clear();

            if (filename != null) {
              this.editor.setFilename(filename);
              this.updateDocumentTitle();
            }

            return;
          } catch (e) {
            mxUtils.alert(mxResources.get("invalidOrMissingFile") + ": " + e.message);
          }
        })
      );
    }
  } catch (e) {
    // ignore
  }

  // Fires as the last step if no file was loaded
  this.editor.graph.view.validate();

  // Required only in special cases where an initial file is opened
  // and the minimumGraphSize changes and CSS must be updated.
  this.editor.graph.sizeDidChange();
  this.editor.fireEvent(new mxEventObject("resetGraphView"));
};

/**
 * Sets the current menu and element.
 */
EditorUi.prototype.setCurrentMenu = function (menu, elt) {
  this.currentMenuElt = elt;
  this.currentMenu = menu;
};

/**
 * Resets the current menu and element.
 */
EditorUi.prototype.resetCurrentMenu = function () {
  this.currentMenuElt = null;
  this.currentMenu = null;
};

/**
 * Hides and destroys the current menu.
 */
EditorUi.prototype.hideCurrentMenu = function () {
  if (this.currentMenu != null) {
    this.currentMenu.hideMenu();
    this.resetCurrentMenu();
  }
};

/**
 * Updates the document title.
 */
EditorUi.prototype.updateDocumentTitle = function () {
  let title = this.editor.getOrCreateFilename();

  if (this.editor.appName != null) {
    title += " - " + this.editor.appName;
  }

  document.title = title;
};

/**
 * Updates the document title.
 */
EditorUi.prototype.createHoverIcons = function () {
  return new HoverIcons(this.editor.graph);
};

/**
 * Returns the URL for a copy of this editor with no state.
 */
EditorUi.prototype.redo = function () {
  try {
    const graph = this.editor.graph;

    if (graph.isEditing()) {
      document.execCommand("redo", false, null);
    } else {
      this.editor.undoManager.redo();
    }
  } catch (e) {
    // ignore all errors
  }
};

/**
 * Returns the URL for a copy of this editor with no state.
 */
EditorUi.prototype.undo = function () {
  try {
    const graph = this.editor.graph;

    if (graph.isEditing()) {
      // Stops editing and executes undo on graph if native undo
      // does not affect current editing value
      const value = graph.cellEditor.textarea.innerHTML;
      document.execCommand("undo", false, null);

      if (value == graph.cellEditor.textarea.innerHTML) {
        graph.stopEditing(true);
        this.editor.undoManager.undo();
      }
    } else {
      this.editor.undoManager.undo();
    }
  } catch (e) {
    // ignore all errors
  }
};

/**
 * Returns the URL for a copy of this editor with no state.
 */
EditorUi.prototype.canRedo = function () {
  return this.editor.graph.isEditing() || this.editor.undoManager.canRedo();
};

/**
 * Returns the URL for a copy of this editor with no state.
 */
EditorUi.prototype.canUndo = function () {
  return this.editor.graph.isEditing() || this.editor.undoManager.canUndo();
};

/**
 *
 */
EditorUi.prototype.getEditBlankXml = function () {
  return mxUtils.getXml(this.editor.getGraphXml());
};

/**
 * Returns the URL for a copy of this editor with no state.
 */
EditorUi.prototype.getUrl = function (pathname) {
  const href = pathname != null ? pathname : window.location.pathname;
  return href;
};

/**
 * Specifies if the graph has scrollbars.
 */
EditorUi.prototype.setScrollbars = function (value) {
  const graph = this.editor.graph;
  const prev = graph.container.style.overflow;
  graph.scrollbars = value;
  this.editor.updateGraphComponents();

  if (prev != graph.container.style.overflow) {
    graph.container.scrollTop = 0;
    graph.container.scrollLeft = 0;
    graph.view.scaleAndTranslate(1, 0, 0);
    this.resetScrollbars();
  }

  this.fireEvent(new mxEventObject("scrollbarsChanged"));
};

/**
 * Returns true if the graph has scrollbars.
 */
EditorUi.prototype.hasScrollbars = function () {
  return this.editor.graph.scrollbars;
};

/**
 * Resets the state of the scrollbars.
 */
EditorUi.prototype.resetScrollbars = function () {
  const graph = this.editor.graph;

  if (!this.editor.extendCanvas) {
    graph.container.scrollTop = 0;
    graph.container.scrollLeft = 0;

    if (!mxUtils.hasScrollbars(graph.container)) {
      graph.view.setTranslate(0, 0);
    }
  } else if (!this.editor.isChromelessView()) {
    if (mxUtils.hasScrollbars(graph.container)) {
      if (graph.pageVisible) {
        const pad = graph.getPagePadding();
        graph.container.scrollTop = Math.floor(pad.y - this.editor.initialTopSpacing) - 1;
        graph.container.scrollLeft =
          Math.floor(
            Math.min(pad.x, (graph.container.scrollWidth - graph.container.clientWidth) / 2)
          ) - 1;

        // Scrolls graph to visible area
        var bounds = graph.getGraphBounds();

        if (bounds.width > 0 && bounds.height > 0) {
          if (bounds.x > graph.container.scrollLeft + graph.container.clientWidth * 0.9) {
            graph.container.scrollLeft = Math.min(
              bounds.x + bounds.width - graph.container.clientWidth,
              bounds.x - 10
            );
          }

          if (bounds.y > graph.container.scrollTop + graph.container.clientHeight * 0.9) {
            graph.container.scrollTop = Math.min(
              bounds.y + bounds.height - graph.container.clientHeight,
              bounds.y - 10
            );
          }
        }
      } else {
        var bounds = graph.getGraphBounds();
        const width = Math.max(bounds.width, graph.scrollTileSize.width * graph.view.scale);
        const height = Math.max(bounds.height, graph.scrollTileSize.height * graph.view.scale);
        graph.container.scrollTop = Math.floor(
          Math.max(0, bounds.y - Math.max(20, (graph.container.clientHeight - height) / 4))
        );
        graph.container.scrollLeft = Math.floor(
          Math.max(0, bounds.x - Math.max(0, (graph.container.clientWidth - width) / 2))
        );
      }
    } else {
      const b = mxRectangle.fromRectangle(
        graph.pageVisible ? graph.view.getBackgroundPageBounds() : graph.getGraphBounds()
      );
      const tr = graph.view.translate;
      const s = graph.view.scale;
      b.x = b.x / s - tr.x;
      b.y = b.y / s - tr.y;
      b.width /= s;
      b.height /= s;

      const dy = graph.pageVisible ? 0 : Math.max(0, (graph.container.clientHeight - b.height) / 4);

      graph.view.setTranslate(
        Math.floor(Math.max(0, (graph.container.clientWidth - b.width) / 2) - b.x + 2),
        Math.floor(dy - b.y + 1)
      );
    }
  }
};

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setPageVisible = function (value) {
  const graph = this.editor.graph;
  const hasScrollbars = mxUtils.hasScrollbars(graph.container);
  let tx = 0;
  let ty = 0;

  if (hasScrollbars) {
    tx = graph.view.translate.x * graph.view.scale - graph.container.scrollLeft;
    ty = graph.view.translate.y * graph.view.scale - graph.container.scrollTop;
  }

  graph.pageVisible = value;
  graph.pageBreaksVisible = value;
  graph.preferPageSize = value;
  graph.view.validateBackground();

  // Workaround for possible handle offset
  if (hasScrollbars) {
    const cells = graph.getSelectionCells();
    graph.clearSelection();
    graph.setSelectionCells(cells);
  }

  // Calls updatePageBreaks
  graph.sizeDidChange();

  if (hasScrollbars) {
    graph.container.scrollLeft = graph.view.translate.x * graph.view.scale - tx;
    graph.container.scrollTop = graph.view.translate.y * graph.view.scale - ty;
  }

  this.fireEvent(new mxEventObject("pageViewChanged"));
};

/**
 * Change types
 */
function ChangePageSetup(ui, color, image, format, pageScale) {
  this.ui = ui;
  this.color = color;
  this.previousColor = color;
  this.image = image;
  this.previousImage = image;
  this.format = format;
  this.previousFormat = format;
  this.pageScale = pageScale;
  this.previousPageScale = pageScale;

  // Needed since null are valid values for color and image
  this.ignoreColor = false;
  this.ignoreImage = false;
}

/**
 * Implementation of the undoable page rename.
 */
ChangePageSetup.prototype.execute = function () {
  const graph = this.ui.editor.graph;

  if (!this.ignoreColor) {
    this.color = this.previousColor;
    var tmp = graph.background;
    this.ui.setBackgroundColor(this.previousColor);
    this.previousColor = tmp;
  }

  if (!this.ignoreImage) {
    this.image = this.previousImage;
    var tmp = graph.backgroundImage;
    this.ui.setBackgroundImage(this.previousImage);
    this.previousImage = tmp;
  }

  if (this.previousFormat != null) {
    this.format = this.previousFormat;
    var tmp = graph.pageFormat;

    if (this.previousFormat.width != tmp.width || this.previousFormat.height != tmp.height) {
      this.ui.setPageFormat(this.previousFormat);
      this.previousFormat = tmp;
    }
  }

  if (this.foldingEnabled != null && this.foldingEnabled != this.ui.editor.graph.foldingEnabled) {
    this.ui.setFoldingEnabled(this.foldingEnabled);
    this.foldingEnabled = !this.foldingEnabled;
  }

  if (this.previousPageScale != null) {
    const currentPageScale = this.ui.editor.graph.pageScale;

    if (this.previousPageScale != currentPageScale) {
      this.ui.setPageScale(this.previousPageScale);
      this.previousPageScale = currentPageScale;
    }
  }
};

// Registers codec for ChangePageSetup
(function () {
  const codec = new mxObjectCodec(new ChangePageSetup(), [
    "ui",
    "previousColor",
    "previousImage",
    "previousFormat",
    "previousPageScale",
  ]);

  codec.afterDecode = function (dec, node, obj) {
    obj.previousColor = obj.color;
    obj.previousImage = obj.image;
    obj.previousFormat = obj.format;
    obj.previousPageScale = obj.pageScale;

    if (obj.foldingEnabled != null) {
      obj.foldingEnabled = !obj.foldingEnabled;
    }

    return obj;
  };

  mxCodecRegistry.register(codec);
})();

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setBackgroundColor = function (value) {
  this.editor.graph.background = value;
  this.editor.graph.view.validateBackground();

  this.fireEvent(new mxEventObject("backgroundColorChanged"));
};

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setFoldingEnabled = function (value) {
  this.editor.graph.foldingEnabled = value;
  this.editor.graph.view.revalidate();

  this.fireEvent(new mxEventObject("foldingEnabledChanged"));
};

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setPageFormat = function (value) {
  this.editor.graph.pageFormat = value;

  if (!this.editor.graph.pageVisible) {
    this.actions.get("pageView").funct();
  } else {
    this.editor.graph.view.validateBackground();
    this.editor.graph.sizeDidChange();
  }

  this.fireEvent(new mxEventObject("pageFormatChanged"));
};

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setPageScale = function (value) {
  this.editor.graph.pageScale = value;

  if (!this.editor.graph.pageVisible) {
    this.actions.get("pageView").funct();
  } else {
    this.editor.graph.view.validateBackground();
    this.editor.graph.sizeDidChange();
  }

  this.fireEvent(new mxEventObject("pageScaleChanged"));
};

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setGridColor = function (value) {
  this.editor.graph.view.gridColor = value;
  this.editor.graph.view.validateBackground();
  this.fireEvent(new mxEventObject("gridColorChanged"));
};

/**
 * Updates the states of the given undo/redo items.
 */
EditorUi.prototype.addUndoListener = function () {
  const undo = this.actions.get("undo");
  const redo = this.actions.get("redo");

  const undoMgr = this.editor.undoManager;

  const undoListener = mxUtils.bind(this, function () {
    undo.setEnabled(this.canUndo());
    redo.setEnabled(this.canRedo());
  });

  undoMgr.addListener(mxEvent.ADD, undoListener);
  undoMgr.addListener(mxEvent.UNDO, undoListener);
  undoMgr.addListener(mxEvent.REDO, undoListener);
  undoMgr.addListener(mxEvent.CLEAR, undoListener);

  // Overrides cell editor to update action states
  const cellEditorStartEditing = this.editor.graph.cellEditor.startEditing;

  this.editor.graph.cellEditor.startEditing = function () {
    cellEditorStartEditing.apply(this, arguments);
    undoListener();
  };

  const cellEditorStopEditing = this.editor.graph.cellEditor.stopEditing;

  this.editor.graph.cellEditor.stopEditing = function () {
    cellEditorStopEditing.apply(this, arguments);
    undoListener();
  };

  // Updates the button states once
  undoListener();
};

/**
 * Updates the states of the given toolbar items based on the selection.
 */
EditorUi.prototype.updateActionStates = function () {
  const graph = this.editor.graph;
  const selected = !graph.isSelectionEmpty();
  let vertexSelected = false;
  let edgeSelected = false;

  const cells = graph.getSelectionCells();

  if (cells != null) {
    for (var i = 0; i < cells.length; i++) {
      const cell = cells[i];

      if (graph.getModel().isEdge(cell)) {
        edgeSelected = true;
      }

      if (graph.getModel().isVertex(cell)) {
        vertexSelected = true;
      }

      if (edgeSelected && vertexSelected) {
        break;
      }
    }
  }

  // Updates action states
  const actions = [
    "cut",
    "copy",
    "bold",
    "italic",
    "underline",
    "delete",
    "duplicate",
    "backgroundColor",
    "borderColor",
    "edit",
    "toFront",
    "toBack",
    "lockUnlock",
    "solid",
    "dashed",
    "pasteSize",
    "dotted",
    "fillColor",
    "gradientColor",
    "shadow",
    "fontColor",
    "formattedText",
    "rounded",
    "toggleRounded",
    "sharp",
    "strokeColor",
  ];

  for (var i = 0; i < actions.length; i++) {
    this.actions.get(actions[i]).setEnabled(selected);
  }

  this.actions.get("setAsDefaultStyle").setEnabled(graph.getSelectionCount() == 1);
  this.actions.get("clearWaypoints").setEnabled(!graph.isSelectionEmpty());
  this.actions.get("copySize").setEnabled(graph.getSelectionCount() == 1);
  this.actions.get("turn").setEnabled(!graph.isSelectionEmpty());
  this.actions.get("curved").setEnabled(edgeSelected);
  this.actions.get("rotation").setEnabled(vertexSelected);
  this.actions.get("wordWrap").setEnabled(vertexSelected);
  this.actions.get("autosize").setEnabled(vertexSelected);
  const oneVertexSelected = vertexSelected && graph.getSelectionCount() == 1;
  this.actions
    .get("group")
    .setEnabled(
      graph.getSelectionCount() > 1 ||
        (oneVertexSelected && !graph.isContainer(graph.getSelectionCell()))
    );
  this.actions
    .get("ungroup")
    .setEnabled(
      graph.getSelectionCount() == 1 &&
        (graph.getModel().getChildCount(graph.getSelectionCell()) > 0 ||
          (oneVertexSelected && graph.isContainer(graph.getSelectionCell())))
    );
  this.actions
    .get("removeFromGroup")
    .setEnabled(
      oneVertexSelected &&
        graph.getModel().isVertex(graph.getModel().getParent(graph.getSelectionCell()))
    );

  // Updates menu states
  this.menus.get("navigation").setEnabled(selected || graph.view.currentRoot != null);
  this.actions
    .get("collapsible")
    .setEnabled(
      vertexSelected &&
        (graph.isContainer(graph.getSelectionCell()) ||
          graph.model.getChildCount(graph.getSelectionCell()) > 0)
    );
  this.actions.get("home").setEnabled(graph.view.currentRoot != null);
  this.actions.get("exitGroup").setEnabled(graph.view.currentRoot != null);
  this.actions
    .get("enterGroup")
    .setEnabled(graph.getSelectionCount() == 1 && graph.isValidRoot(graph.getSelectionCell()));
  const foldable = graph.getSelectionCount() == 1 && graph.isCellFoldable(graph.getSelectionCell());
  this.actions.get("expand").setEnabled(foldable);
  this.actions.get("collapse").setEnabled(foldable);

  this.actions.get("guides").setEnabled(graph.isEnabled());
  this.actions.get("grid").setEnabled(!this.editor.chromeless || this.editor.editable);

  const unlocked = graph.isEnabled() && !graph.isCellLocked(graph.getDefaultParent());
  this.menus.get("layout").setEnabled(unlocked);
  this.menus.get("direction").setEnabled(unlocked && vertexSelected);
  this.menus.get("align").setEnabled(unlocked && vertexSelected && graph.getSelectionCount() > 1);
  this.menus
    .get("distribute")
    .setEnabled(unlocked && vertexSelected && graph.getSelectionCount() > 1);
  this.actions.get("selectVertices").setEnabled(unlocked);
  this.actions.get("selectEdges").setEnabled(unlocked);
  this.actions.get("selectAll").setEnabled(unlocked);
  this.actions.get("selectNone").setEnabled(unlocked);

  this.updatePasteActionStates();
};

EditorUi.prototype.zeroOffset = new mxPoint(0, 0);

EditorUi.prototype.getDiagramContainerOffset = function () {
  return this.zeroOffset;
};

/**
 * Refreshes the viewport.
 */
EditorUi.prototype.refresh = function (sizeDidChange) {
  sizeDidChange = sizeDidChange != null ? sizeDidChange : true;

  const quirks = mxClient.IS_IE && (document.documentMode == null || document.documentMode == 5);
  let w = this.container.clientWidth;
  let h = this.container.clientHeight;

  if (this.container == document.body) {
    w = document.body.clientWidth || document.documentElement.clientWidth;
    h = quirks
      ? document.body.clientHeight || document.documentElement.clientHeight
      : document.documentElement.clientHeight;
  }

  // Workaround for bug on iOS see
  // http://stackoverflow.com/questions/19012135/ios-7-ipad-safari-landscape-innerheight-outerheight-layout-issue
  // FIXME: Fix if footer visible
  let off = 0;

  if (mxClient.IS_IOS && !window.navigator.standalone) {
    if (window.innerHeight != document.documentElement.clientHeight) {
      off = document.documentElement.clientHeight - window.innerHeight;
      window.scrollTo(0, 0);
    }
  }

  const effHsplitPosition = Math.max(0, Math.min(this.hsplitPosition, w - this.splitSize - 20));
  let tmp = 0;

  if (this.menubar != null) {
    this.menubarContainer.style.height = this.menubarHeight + "px";
    tmp += this.menubarHeight;
  }

  if (this.toolbar != null) {
    this.toolbarContainer.style.top = this.menubarHeight + "px";
    this.toolbarContainer.style.height = this.toolbarHeight + "px";
    tmp += this.toolbarHeight;
  }

  if (tmp > 0 && !mxClient.IS_QUIRKS) {
    tmp += 1;
  }

  let sidebarFooterHeight = 0;

  if (this.sidebarFooterContainer != null) {
    const bottom = this.footerHeight + off;
    sidebarFooterHeight = Math.max(0, Math.min(h - tmp - bottom, this.sidebarFooterHeight));
    this.sidebarFooterContainer.style.width = effHsplitPosition + "px";
    this.sidebarFooterContainer.style.height = sidebarFooterHeight + "px";
    this.sidebarFooterContainer.style.bottom = bottom + "px";
  }

  const fw = this.format != null ? this.formatWidth : 0;
  this.sidebarContainer.style.top = tmp + "px";
  this.sidebarContainer.style.width = effHsplitPosition + "px";
  this.formatContainer.style.top = tmp + "px";
  this.formatContainer.style.width = fw + "px";
  this.formatContainer.style.display = this.format != null ? "" : "none";

  const diagContOffset = this.getDiagramContainerOffset();
  const contLeft = this.hsplit.parentNode != null ? effHsplitPosition + this.splitSize : 0;
  this.diagramContainer.style.left = contLeft + diagContOffset.x + "px";
  this.diagramContainer.style.top = tmp + diagContOffset.y + "px";
  this.footerContainer.style.height = this.footerHeight + "px";
  this.hsplit.style.top = this.sidebarContainer.style.top;
  this.hsplit.style.bottom = this.footerHeight + off + "px";
  this.hsplit.style.left = effHsplitPosition + "px";
  this.footerContainer.style.display = this.footerHeight == 0 ? "none" : "";

  if (this.tabContainer != null) {
    this.tabContainer.style.left = contLeft + "px";
  }

  if (quirks) {
    this.menubarContainer.style.width = w + "px";
    this.toolbarContainer.style.width = this.menubarContainer.style.width;
    const sidebarHeight = Math.max(
      0,
      h - this.footerHeight - this.menubarHeight - this.toolbarHeight
    );
    this.sidebarContainer.style.height = sidebarHeight - sidebarFooterHeight + "px";
    this.formatContainer.style.height = sidebarHeight + "px";
    this.diagramContainer.style.width =
      this.hsplit.parentNode != null
        ? Math.max(0, w - effHsplitPosition - this.splitSize - fw) + "px"
        : w + "px";
    this.footerContainer.style.width = this.menubarContainer.style.width;
    let diagramHeight = Math.max(
      0,
      h - this.footerHeight - this.menubarHeight - this.toolbarHeight
    );

    if (this.tabContainer != null) {
      this.tabContainer.style.width = this.diagramContainer.style.width;
      this.tabContainer.style.bottom = this.footerHeight + off + "px";
      diagramHeight -= this.tabContainer.clientHeight;
    }

    this.diagramContainer.style.height = diagramHeight + "px";
    this.hsplit.style.height = diagramHeight + "px";
  } else {
    if (this.footerHeight > 0) {
      this.footerContainer.style.bottom = off + "px";
    }

    this.diagramContainer.style.right = fw + "px";
    let th = 0;

    if (this.tabContainer != null) {
      this.tabContainer.style.bottom = this.footerHeight + off + "px";
      this.tabContainer.style.right = this.diagramContainer.style.right;
      th = this.tabContainer.clientHeight;
    }

    this.sidebarContainer.style.bottom = this.footerHeight + sidebarFooterHeight + off + "px";
    this.formatContainer.style.bottom = this.footerHeight + off + "px";
    this.diagramContainer.style.bottom = this.footerHeight + off + th + "px";
  }

  if (sizeDidChange) {
    this.editor.graph.sizeDidChange();
  }
};

/**
 * Creates the required containers.
 */
EditorUi.prototype.createTabContainer = function () {
  return null;
};

/**
 * Creates the required containers.
 */
EditorUi.prototype.createDivs = function () {
  this.menubarContainer = this.createDiv("geMenubarContainer");
  this.toolbarContainer = this.createDiv("geToolbarContainer");
  this.sidebarContainer = this.createDiv("geSidebarContainer");
  this.formatContainer = this.createDiv("geSidebarContainer geFormatContainer");
  this.diagramContainer = this.createDiv("geDiagramContainer");
  this.footerContainer = this.createDiv("geFooterContainer");
  this.hsplit = this.createDiv("geHsplit");
  this.hsplit.setAttribute("title", mxResources.get("collapseExpand"));

  // Sets static style for containers
  this.menubarContainer.style.top = "0px";
  this.menubarContainer.style.left = "0px";
  this.menubarContainer.style.right = "0px";
  this.toolbarContainer.style.left = "0px";
  this.toolbarContainer.style.right = "0px";
  this.sidebarContainer.style.left = "0px";
  this.formatContainer.style.right = "0px";
  this.formatContainer.style.zIndex = "1";
  this.diagramContainer.style.right = (this.format != null ? this.formatWidth : 0) + "px";
  this.footerContainer.style.left = "0px";
  this.footerContainer.style.right = "0px";
  this.footerContainer.style.bottom = "0px";
  this.footerContainer.style.zIndex = mxPopupMenu.prototype.zIndex - 2;
  this.hsplit.style.width = this.splitSize + "px";
  this.sidebarFooterContainer = this.createSidebarFooterContainer();

  if (this.sidebarFooterContainer) {
    this.sidebarFooterContainer.style.left = "0px";
  }

  if (!this.editor.chromeless) {
    this.tabContainer = this.createTabContainer();
  } else {
    this.diagramContainer.style.border = "none";
  }
};

/**
 * Hook for sidebar footer container. This implementation returns null.
 */
EditorUi.prototype.createSidebarFooterContainer = function () {
  return null;
};

/**
 * Creates the required containers.
 */
EditorUi.prototype.createUi = function () {
  // Creates menubar
  this.menubar = this.editor.chromeless
    ? null
    : this.menus.createMenubar(this.createDiv("geMenubar"));

  if (this.menubar != null) {
    this.exitButton = this.createDiv("diagram-exit");
    this.menubarContainer.appendChild(this.menubar.container);
    this.menubarContainer.appendChild(this.exitButton);
  }

  // Adds status bar in menubar
  if (this.menubar != null) {
    this.statusContainer = this.createStatusContainer();

    // Connects the status bar to the editor status
    this.editor.addListener(
      "statusChanged",
      mxUtils.bind(this, function () {
        this.setStatusText(this.editor.getStatus());
      })
    );

    this.setStatusText(this.editor.getStatus());
    this.menubar.container.appendChild(this.statusContainer);

    // Inserts into DOM
    this.container.appendChild(this.menubarContainer);
  }

  // Creates the sidebar
  this.sidebar = this.editor.chromeless ? null : this.createSidebar(this.sidebarContainer);

  if (this.sidebar != null) {
    this.container.appendChild(this.sidebarContainer);
  }

  // Creates the format sidebar
  this.format =
    this.editor.chromeless || !this.formatEnabled ? null : this.createFormat(this.formatContainer);

  if (this.format != null) {
    this.container.appendChild(this.formatContainer);
  }

  // Creates the footer
  const footer = this.editor.chromeless ? null : this.createFooter();

  if (footer != null) {
    this.footerContainer.appendChild(footer);
    this.container.appendChild(this.footerContainer);
  }

  if (this.sidebar != null && this.sidebarFooterContainer) {
    this.container.appendChild(this.sidebarFooterContainer);
  }

  this.container.appendChild(this.diagramContainer);

  if (this.container != null && this.tabContainer != null) {
    this.container.appendChild(this.tabContainer);
  }

  // Creates toolbar
  this.toolbar = this.editor.chromeless ? null : this.createToolbar(this.createDiv("geToolbar"));

  if (this.toolbar != null) {
    this.toolbarContainer.appendChild(this.toolbar.container);
    this.container.appendChild(this.toolbarContainer);
  }

  // HSplit
  if (this.sidebar != null) {
    this.container.appendChild(this.hsplit);

    this.addSplitHandler(
      this.hsplit,
      true,
      0,
      mxUtils.bind(this, function (value) {
        this.hsplitPosition = value;
        this.refresh();
      })
    );
  }
};

/**
 * Creates a new toolbar for the given container.
 */
EditorUi.prototype.createStatusContainer = function () {
  const container = document.createElement("a");
  container.className = "geItem geStatus";

  if (screen.width < 420) {
    container.style.maxWidth = Math.max(20, screen.width - 320) + "px";
    container.style.overflow = "hidden";
  }

  return container;
};

/**
 * Creates a new toolbar for the given container.
 */
EditorUi.prototype.setStatusText = function (value) {
  this.statusContainer.innerHTML = value;
};

/**
 * Creates a new toolbar for the given container.
 */
EditorUi.prototype.createToolbar = function (container) {
  return new Toolbar(this, container);
};

/**
 * Creates a new sidebar for the given container.
 */
EditorUi.prototype.createSidebar = function (container) {
  return new Sidebar(this, container);
};

/**
 * Creates a new sidebar for the given container.
 */
EditorUi.prototype.createFormat = function (container) {
  return new Format(this, container);
};

/**
 * Creates and returns a new footer.
 */
EditorUi.prototype.createFooter = function () {
  return this.createDiv("geFooter");
};

/**
 * Creates the actual toolbar for the toolbar container.
 */
EditorUi.prototype.createDiv = function (classname) {
  const elt = document.createElement("div");
  elt.className = classname;

  return elt;
};

/**
 * Updates the states of the given undo/redo items.
 */
EditorUi.prototype.addSplitHandler = function (elt, horizontal, dx, onChange) {
  let start = null;
  let initial = null;
  let ignoreClick = true;
  let last = null;

  // Disables built-in pan and zoom in IE10 and later
  if (mxClient.IS_POINTER) {
    elt.style.touchAction = "none";
  }

  const getValue = mxUtils.bind(this, function () {
    let result = parseInt(horizontal ? elt.style.left : elt.style.bottom);

    // Takes into account hidden footer
    if (!horizontal) {
      result = result + dx - this.footerHeight;
    }

    return result;
  });

  function moveHandler(evt) {
    if (start != null) {
      const pt = new mxPoint(mxEvent.getClientX(evt), mxEvent.getClientY(evt));
      onChange(Math.max(0, initial + (horizontal ? pt.x - start.x : start.y - pt.y) - dx));
      mxEvent.consume(evt);

      if (initial != getValue()) {
        ignoreClick = true;
        last = null;
      }
    }
  }

  function dropHandler(evt) {
    moveHandler(evt);
    initial = null;
    start = null;
  }

  mxEvent.addGestureListeners(elt, function (evt) {
    start = new mxPoint(mxEvent.getClientX(evt), mxEvent.getClientY(evt));
    initial = getValue();
    ignoreClick = false;
    mxEvent.consume(evt);
  });

  mxEvent.addListener(
    elt,
    "click",
    mxUtils.bind(this, function (evt) {
      if (!ignoreClick && this.hsplitClickEnabled) {
        const next = last != null ? last - dx : 0;
        last = getValue();
        onChange(next);
        mxEvent.consume(evt);
      }
    })
  );

  mxEvent.addGestureListeners(document, null, moveHandler, dropHandler);

  this.destroyFunctions.push(function () {
    mxEvent.removeGestureListeners(document, null, moveHandler, dropHandler);
  });
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
EditorUi.prototype.handleError = function (resp, title, fn, invokeFnOnClose) {
  const e = resp != null && resp.error != null ? resp.error : resp;

  if (e != null || title != null) {
    let msg = mxUtils.htmlEntities(mxResources.get("unknownError"));
    const btn = mxResources.get("ok");
    title = title != null ? title : mxResources.get("error");

    if (e != null && e.message != null) {
      msg = mxUtils.htmlEntities(e.message);
    }

    this.showError(
      title,
      msg,
      btn,
      fn,
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      null,
      invokeFnOnClose ? fn : null
    );
  } else if (fn != null) {
    fn();
  }
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
EditorUi.prototype.showError = function (
  title,
  msg,
  btn,
  fn,
  retry,
  btn2,
  fn2,
  btn3,
  fn3,
  w,
  h,
  hide,
  onClose
) {
  const dlg = new ErrorDialog(
    this,
    title,
    msg,
    btn || mxResources.get("ok"),
    fn,
    retry,
    btn2,
    fn2,
    hide,
    btn3,
    fn3
  );
  const lines = Math.ceil(msg != null ? msg.length / 50 : 1);
  this.showDialog(dlg.container, w || 340, h || 100 + lines * 20, true, false, onClose);
  dlg.init();
};

/**
 * Displays a print dialog.
 */
EditorUi.prototype.showDialog = function (
  elt,
  w,
  h,
  modal,
  closable,
  onClose,
  noScroll,
  transparent,
  onResize,
  ignoreBgClick
) {
  this.editor.graph.tooltipHandler.hideTooltip();

  if (this.dialogs == null) {
    this.dialogs = [];
  }

  this.dialog = new Dialog(
    this,
    elt,
    w,
    h,
    modal,
    closable,
    onClose,
    noScroll,
    transparent,
    onResize,
    ignoreBgClick
  );
  this.dialogs.push(this.dialog);
};

/**
 * Displays a print dialog.
 */
EditorUi.prototype.hideDialog = function (cancel, isEsc) {
  if (this.dialogs != null && this.dialogs.length > 0) {
    const dlg = this.dialogs.pop();

    if (dlg.close(cancel, isEsc) == false) {
      //add the dialog back if dialog closing is cancelled
      this.dialogs.push(dlg);
      return;
    }

    this.dialog = this.dialogs.length > 0 ? this.dialogs[this.dialogs.length - 1] : null;
    this.editor.fireEvent(new mxEventObject("hideDialog"));

    if (this.dialog == null && this.editor.graph.container.style.visibility != "hidden") {
      window.setTimeout(
        mxUtils.bind(this, function () {
          if (this.editor.graph.isEditing() && this.editor.graph.cellEditor.textarea != null) {
            this.editor.graph.cellEditor.textarea.focus();
          } else {
            mxUtils.clearSelection();
            this.editor.graph.container.focus();
          }
        }),
        0
      );
    }
  }
};

/**
 * Handles ctrl+enter keystroke to clone cells.
 */
EditorUi.prototype.ctrlEnter = function () {
  const graph = this.editor.graph;

  if (graph.isEnabled()) {
    try {
      const cells = graph.getSelectionCells();
      const lookup = new mxDictionary();
      const newCells = [];

      for (let i = 0; i < cells.length; i++) {
        // Clones table rows instead of cells
        const cell = graph.isTableCell(cells[i]) ? graph.model.getParent(cells[i]) : cells[i];

        if (cell != null && !lookup.get(cell)) {
          lookup.put(cell, true);
          newCells.push(cell);
        }
      }

      graph.setSelectionCells(graph.duplicateCells(newCells, false));
    } catch (e) {
      this.handleError(e);
    }
  }
};

/**
 * Display a color dialog.
 */
EditorUi.prototype.pickColor = function (color, apply) {
  const graph = this.editor.graph;
  const selState = graph.cellEditor.saveSelection();
  const h =
    226 +
    (Math.ceil(ColorDialog.prototype.presetColors.length / 12) +
      Math.ceil(ColorDialog.prototype.defaultColors.length / 12)) *
      17;

  const dlg = new ColorDialog(
    this,
    color || "none",
    function (color) {
      graph.cellEditor.restoreSelection(selState);
      apply(color);
    },
    function () {
      graph.cellEditor.restoreSelection(selState);
    }
  );
  this.showDialog(dlg.container, 230, h, true, false);
  dlg.init();
};

/**
 * Extracs the graph model from the given HTML data from a data transfer event.
 */
EditorUi.prototype.extractGraphModelFromHtml = function (data) {
  let result = null;

  try {
    const idx = data.indexOf("&lt;mxGraphModel ");

    if (idx >= 0) {
      const idx2 = data.lastIndexOf("&lt;/mxGraphModel&gt;");

      if (idx2 > idx) {
        result = data
          .substring(idx, idx2 + 21)
          .replace(/&gt;/g, ">")
          .replace(/&lt;/g, "<")
          .replace(/\\&quot;/g, '"')
          .replace(/\n/g, "");
      }
    }
  } catch (e) {
    // ignore
  }

  return result;
};

/**
 * Opens the given files in the editor.
 */
EditorUi.prototype.extractGraphModelFromEvent = function (evt) {
  let result = null;
  let data = null;

  if (evt != null) {
    const provider = evt.dataTransfer != null ? evt.dataTransfer : evt.clipboardData;

    if (provider != null) {
      if (document.documentMode == 10 || document.documentMode == 11) {
        data = provider.getData("Text");
      } else {
        data =
          mxUtils.indexOf(provider.types, "text/html") >= 0 ? provider.getData("text/html") : null;

        if (mxUtils.indexOf(provider.types, "text/plain" && (data == null || data.length == 0))) {
          data = provider.getData("text/plain");
        }
      }

      if (data != null) {
        data = Graph.zapGremlins(mxUtils.trim(data));

        // Tries parsing as HTML document with embedded XML
        const xml = this.extractGraphModelFromHtml(data);

        if (xml != null) {
          data = xml;
        }
      }
    }
  }

  if (data != null && this.isCompatibleString(data)) {
    result = data;
  }

  return result;
};

/**
 * Hook for subclassers to return true if event data is a supported format.
 * This implementation always returns false.
 */
EditorUi.prototype.isCompatibleString = function () {
  return false;
};

/**
 * Executes the given layout.
 */
EditorUi.prototype.executeLayout = function (exec, animate, post) {
  const graph = this.editor.graph;

  if (graph.isEnabled()) {
    graph.getModel().beginUpdate();
    try {
      exec();
    } catch (e) {
      throw e;
    } finally {
      // Animates the changes in the graph model except
      // for Camino, where animation is too slow
      if (
        this.allowAnimation &&
        animate &&
        (navigator.userAgent == null || navigator.userAgent.indexOf("Camino") < 0)
      ) {
        // New API for animating graph layout results asynchronously
        const morph = new mxMorphing(graph);
        morph.addListener(
          mxEvent.DONE,
          mxUtils.bind(this, function () {
            graph.getModel().endUpdate();

            if (post != null) {
              post();
            }
          })
        );

        morph.startAnimation();
      } else {
        graph.getModel().endUpdate();

        if (post != null) {
          post();
        }
      }
    }
  }
};

/**
 * Hides the current menu.
 */
EditorUi.prototype.showImageDialog = function (title, value, fn) {
  const cellEditor = this.editor.graph.cellEditor;
  const selState = cellEditor.saveSelection();
  const newValue = mxUtils.prompt(title, value);
  cellEditor.restoreSelection(selState);

  if (newValue != null && newValue.length > 0) {
    const img = new Image();

    img.onload = function () {
      fn(newValue, img.width, img.height);
    };
    img.onerror = function () {
      fn(null);
      mxUtils.alert(mxResources.get("fileNotFound"));
    };

    img.src = newValue;
  } else {
    fn(null);
  }
};

/**
 * Hides the current menu.
 */
EditorUi.prototype.showLinkDialog = function () {
  // var dlg = new LinkDialog(this, value, btnLabel, fn);
  // this.showDialog(dlg.container, 420, 90, true, true);
  // dlg.init();
};

/**
 * Hides the current menu.
 */
EditorUi.prototype.showBackgroundImageDialog = function (apply, img) {
  apply =
    apply != null
      ? apply
      : mxUtils.bind(this, function (image) {
          const change = new ChangePageSetup(this, null, image);
          change.ignoreColor = true;

          this.editor.graph.model.execute(change);
        });

  const newValue = mxUtils.prompt(mxResources.get("backgroundImage"), img != null ? img.src : "");

  if (newValue != null && newValue.length > 0) {
    var img = new Image();

    img.onload = function () {
      apply(new mxImage(newValue, img.width, img.height), false);
    };
    img.onerror = function () {
      apply(null, true);
      mxUtils.alert(mxResources.get("fileNotFound"));
    };

    img.src = newValue;
  } else {
    apply(null);
  }
};

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setBackgroundImage = function (image) {
  this.editor.graph.setBackgroundImage(image);
  this.editor.graph.view.validateBackgroundImage();

  this.fireEvent(new mxEventObject("backgroundImageChanged"));
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
EditorUi.prototype.confirm = function (msg, okFn, cancelFn) {
  if (mxUtils.confirm(msg)) {
    if (okFn != null) {
      okFn();
    }
  } else if (cancelFn != null) {
    cancelFn();
  }
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
EditorUi.prototype.createOutline = function () {
  const outline = new mxOutline(this.editor.graph);
  outline.border = 20;

  mxEvent.addListener(window, "resize", function () {
    outline.update();
  });

  this.addListener("pageFormatChanged", function () {
    outline.update();
  });

  return outline;
};

// Alt+Shift+Keycode mapping to action
EditorUi.prototype.altShiftActions = {
  67: "clearWaypoints", // Alt+Shift+C
  65: "connectionArrows", // Alt+Shift+A
  80: "connectionPoints", // Alt+Shift+P
  84: "editTooltip", // Alt+Shift+T
  86: "pasteSize", // Alt+Shift+V
  88: "copySize", // Alt+Shift+X
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
EditorUi.prototype.createKeyHandler = function () {
  const editorUi = this;
  const graph = this.editor.graph;
  const keyHandler = new mxKeyHandler(graph);

  const isEventIgnored = keyHandler.isEventIgnored;
  keyHandler.isEventIgnored = function (evt) {
    // Handles undo/redo/ctrl+./,/u via action and allows ctrl+b/i
    // only if editing value is HTML (except for FF and Safari)
    return (
      !(mxEvent.isShiftDown(evt) && evt.keyCode == 9) &&
      (!this.isControlDown(evt) ||
        mxEvent.isShiftDown(evt) ||
        (evt.keyCode != 90 &&
          evt.keyCode != 89 &&
          evt.keyCode != 188 &&
          evt.keyCode != 190 &&
          evt.keyCode != 85)) &&
      ((evt.keyCode != 66 && evt.keyCode != 73) ||
        !this.isControlDown(evt) ||
        (this.graph.cellEditor.isContentEditing() && !mxClient.IS_FF && !mxClient.IS_SF)) &&
      isEventIgnored.apply(this, arguments)
    );
  };

  // Ignores graph enabled state but not chromeless state
  keyHandler.isEnabledForEvent = function (evt) {
    return (
      !mxEvent.isConsumed(evt) &&
      this.isGraphEvent(evt) &&
      this.isEnabled() &&
      (editorUi.dialogs == null || editorUi.dialogs.length == 0)
    );
  };

  // Routes command-key to control-key on Mac
  keyHandler.isControlDown = function (evt) {
    return mxEvent.isControlDown(evt) || (mxClient.IS_MAC && evt.metaKey);
  };

  let queue = [];
  let thread = null;

  // Helper function to move cells with the cursor keys
  function nudge(keyCode, stepSize, resize) {
    queue.push(function () {
      if (!graph.isSelectionEmpty() && graph.isEnabled()) {
        stepSize = stepSize != null ? stepSize : 1;

        if (resize) {
          // Resizes all selected vertices
          graph.getModel().beginUpdate();
          try {
            var cells = graph.getSelectionCells();

            for (var i = 0; i < cells.length; i++) {
              if (graph.getModel().isVertex(cells[i]) && graph.isCellResizable(cells[i])) {
                let geo = graph.getCellGeometry(cells[i]);

                if (geo != null) {
                  geo = geo.clone();

                  if (keyCode == 37) {
                    geo.width = Math.max(0, geo.width - stepSize);
                  } else if (keyCode == 38) {
                    geo.height = Math.max(0, geo.height - stepSize);
                  } else if (keyCode == 39) {
                    geo.width += stepSize;
                  } else if (keyCode == 40) {
                    geo.height += stepSize;
                  }

                  graph.getModel().setGeometry(cells[i], geo);
                }
              }
            }
          } finally {
            graph.getModel().endUpdate();
          }
        } else {
          // Moves vertices up/down in a stack layout
          const cell = graph.getSelectionCell();
          var parent = graph.model.getParent(cell);
          let layout = null;

          if (
            graph.getSelectionCount() == 1 &&
            graph.model.isVertex(cell) &&
            graph.layoutManager != null &&
            !graph.isCellLocked(cell)
          ) {
            layout = graph.layoutManager.getLayout(parent);
          }

          if (layout != null && layout.constructor == mxStackLayout) {
            const index = parent.getIndex(cell);

            if (keyCode == 37 || keyCode == 38) {
              graph.model.add(parent, cell, Math.max(0, index - 1));
            } else if (keyCode == 39 || keyCode == 40) {
              graph.model.add(parent, cell, Math.min(graph.model.getChildCount(parent), index + 1));
            }
          } else {
            var cells = graph.getMovableCells(graph.getSelectionCells());
            const realCells = [];

            for (var i = 0; i < cells.length; i++) {
              // TODO: Use getCompositeParent
              const style = graph.getCurrentCellStyle(cells[i]);

              if (mxUtils.getValue(style, "part", "0") == "1") {
                var parent = graph.model.getParent(cells[i]);

                if (graph.model.isVertex(parent) && mxUtils.indexOf(cells, parent) < 0) {
                  realCells.push(parent);
                }
              } else {
                realCells.push(cells[i]);
              }
            }

            if (realCells.length > 0) {
              cells = realCells;
              let dx = 0;
              let dy = 0;

              if (keyCode == 37) {
                dx = -stepSize;
              } else if (keyCode == 38) {
                dy = -stepSize;
              } else if (keyCode == 39) {
                dx = stepSize;
              } else if (keyCode == 40) {
                dy = stepSize;
              }

              graph.moveCells(cells, dx, dy);
            }
          }
        }
      }
    });

    if (thread != null) {
      window.clearTimeout(thread);
    }

    thread = window.setTimeout(function () {
      if (queue.length > 0) {
        graph.getModel().beginUpdate();

        try {
          for (let i = 0; i < queue.length; i++) {
            queue[i]();
          }

          queue = [];
        } finally {
          graph.getModel().endUpdate();
        }
      }
    }, 200);
  }

  // Overridden to handle special alt+shift+cursor keyboard shortcuts
  const directions = {
    37: mxConstants.DIRECTION_WEST,
    38: mxConstants.DIRECTION_NORTH,
    39: mxConstants.DIRECTION_EAST,
    40: mxConstants.DIRECTION_SOUTH,
  };

  const keyHandlerGetFunction = keyHandler.getFunction;

  mxKeyHandler.prototype.getFunction = function (evt) {
    if (graph.isEnabled()) {
      // TODO: Add alt modified state in core API, here are some specific cases
      if (mxEvent.isShiftDown(evt) && mxEvent.isAltDown(evt)) {
        const action = editorUi.actions.get(editorUi.altShiftActions[evt.keyCode]);

        if (action != null) {
          return action.funct;
        }
      }

      if (evt.keyCode == 9 && mxEvent.isAltDown(evt)) {
        if (graph.cellEditor.isContentEditing()) {
          // Alt+Shift+Tab while editing
          return function () {
            document.execCommand("outdent", false, null);
          };
        } else if (mxEvent.isShiftDown(evt)) {
          // Alt+Shift+Tab
          return function () {
            graph.selectParentCell();
          };
        } else {
          // Alt+Tab
          return function () {
            graph.selectChildCell();
          };
        }
      } else if (directions[evt.keyCode] != null && !graph.isSelectionEmpty()) {
        // On macOS, Control+Cursor is used by Expose so allow for Alt+Control to resize
        if (!this.isControlDown(evt) && mxEvent.isShiftDown(evt) && mxEvent.isAltDown(evt)) {
          if (graph.model.isVertex(graph.getSelectionCell())) {
            return function () {
              const cells = graph.connectVertex(
                graph.getSelectionCell(),
                directions[evt.keyCode],
                graph.defaultEdgeLength,
                evt,
                true
              );

              if (cells != null && cells.length > 0) {
                if (cells.length == 1 && graph.model.isEdge(cells[0])) {
                  graph.setSelectionCell(graph.model.getTerminal(cells[0], false));
                } else {
                  graph.setSelectionCell(cells[cells.length - 1]);
                }

                graph.scrollCellToVisible(graph.getSelectionCell());

                if (editorUi.hoverIcons != null) {
                  editorUi.hoverIcons.update(graph.view.getState(graph.getSelectionCell()));
                }
              }
            };
          }
        } else {
          // Avoids consuming event if no vertex is selected by returning null below
          // Cursor keys move and resize (ctrl) cells
          if (this.isControlDown(evt)) {
            return function () {
              nudge(evt.keyCode, mxEvent.isShiftDown(evt) ? graph.gridSize : null, true);
            };
          } else {
            return function () {
              nudge(evt.keyCode, mxEvent.isShiftDown(evt) ? graph.gridSize : null);
            };
          }
        }
      }
    }

    return keyHandlerGetFunction.apply(this, arguments);
  };

  // Binds keystrokes to actions
  keyHandler.bindAction = mxUtils.bind(this, function (code, control, key, shift) {
    const action = this.actions.get(key);

    if (action != null) {
      const f = function () {
        if (action.isEnabled()) {
          action.funct();
        }
      };

      if (control) {
        if (shift) {
          keyHandler.bindControlShiftKey(code, f);
        } else {
          keyHandler.bindControlKey(code, f);
        }
      } else {
        if (shift) {
          keyHandler.bindShiftKey(code, f);
        } else {
          keyHandler.bindKey(code, f);
        }
      }
    }
  });

  const ui = this;
  const keyHandlerEscape = keyHandler.escape;
  keyHandler.escape = function () {
    keyHandlerEscape.apply(this, arguments);
  };

  // Ignores enter keystroke. Remove this line if you want the
  // enter keystroke to stop editing. N, W, T are reserved.
  keyHandler.enter = function () {};

  keyHandler.bindControlShiftKey(36, function () {
    graph.exitGroup();
  }); // Ctrl+Shift+Home
  keyHandler.bindControlShiftKey(35, function () {
    graph.enterGroup();
  }); // Ctrl+Shift+End
  keyHandler.bindShiftKey(36, function () {
    graph.home();
  }); // Ctrl+Shift+Home
  keyHandler.bindKey(35, function () {
    graph.refresh();
  }); // End
  keyHandler.bindAction(107, true, "zoomIn"); // Ctrl+Plus
  keyHandler.bindAction(109, true, "zoomOut"); // Ctrl+Minus
  keyHandler.bindAction(80, true, "print"); // Ctrl+P
  keyHandler.bindAction(79, true, "outline", true); // Ctrl+Shift+O

  if (!this.editor.chromeless || this.editor.editable) {
    keyHandler.bindControlKey(36, function () {
      if (graph.isEnabled()) {
        graph.foldCells(true);
      }
    }); // Ctrl+Home
    keyHandler.bindControlKey(35, function () {
      if (graph.isEnabled()) {
        graph.foldCells(false);
      }
    }); // Ctrl+End
    keyHandler.bindControlKey(13, function () {
      ui.ctrlEnter();
    }); // Ctrl+Enter
    keyHandler.bindAction(8, false, "delete"); // Backspace
    keyHandler.bindAction(8, true, "deleteAll"); // Shift+Backspace
    keyHandler.bindAction(46, false, "delete"); // Delete
    keyHandler.bindAction(46, true, "deleteAll"); // Ctrl+Delete
    keyHandler.bindAction(36, false, "resetView"); // Home
    keyHandler.bindAction(72, true, "fitWindow", true); // Ctrl+Shift+H
    keyHandler.bindAction(74, true, "fitPage"); // Ctrl+J
    keyHandler.bindAction(74, true, "fitTwoPages", true); // Ctrl+Shift+J
    keyHandler.bindAction(48, true, "customZoom"); // Ctrl+0
    keyHandler.bindAction(82, true, "turn"); // Ctrl+R
    keyHandler.bindAction(82, true, "clearDefaultStyle", true); // Ctrl+Shift+R
    keyHandler.bindAction(65, true, "selectAll"); // Ctrl+A
    keyHandler.bindAction(65, true, "selectNone", true); // Ctrl+A
    keyHandler.bindAction(73, true, "selectVertices", true); // Ctrl+Shift+I
    keyHandler.bindAction(69, true, "selectEdges", true); // Ctrl+Shift+E
    keyHandler.bindAction(69, true, "editStyle"); // Ctrl+E
    keyHandler.bindAction(66, true, "bold"); // Ctrl+B
    keyHandler.bindAction(66, true, "toBack", true); // Ctrl+Shift+B
    keyHandler.bindAction(70, true, "toFront", true); // Ctrl+Shift+F
    keyHandler.bindAction(68, true, "duplicate"); // Ctrl+D
    keyHandler.bindAction(68, true, "setAsDefaultStyle", true); // Ctrl+Shift+D
    keyHandler.bindAction(90, true, "undo"); // Ctrl+Z
    keyHandler.bindAction(89, true, "autosize", true); // Ctrl+Shift+Y
    keyHandler.bindAction(88, true, "cut"); // Ctrl+X
    keyHandler.bindAction(67, true, "copy"); // Ctrl+C
    keyHandler.bindAction(86, true, "paste"); // Ctrl+V
    keyHandler.bindAction(71, true, "group"); // Ctrl+G
    keyHandler.bindAction(77, true, "editData"); // Ctrl+M
    keyHandler.bindAction(71, true, "grid", true); // Ctrl+Shift+G
    keyHandler.bindAction(73, true, "italic"); // Ctrl+I
    keyHandler.bindAction(76, true, "lockUnlock"); // Ctrl+L
    keyHandler.bindAction(76, true, "layers", true); // Ctrl+Shift+L
    keyHandler.bindAction(80, true, "formatPanel", true); // Ctrl+Shift+P
    keyHandler.bindAction(85, true, "underline"); // Ctrl+U
    keyHandler.bindAction(85, true, "ungroup", true); // Ctrl+Shift+U
    keyHandler.bindAction(190, true, "superscript"); // Ctrl+.
    keyHandler.bindAction(188, true, "subscript"); // Ctrl+,
    keyHandler.bindAction(9, false, "indent", true); // Shift+Tab,
    keyHandler.bindKey(13, function () {
      if (graph.isEnabled()) {
        graph.startEditingAtCell();
      }
    }); // Enter
    keyHandler.bindKey(113, function () {
      if (graph.isEnabled()) {
        graph.startEditingAtCell();
      }
    }); // F2
  }

  if (!mxClient.IS_WIN) {
    keyHandler.bindAction(90, true, "redo", true); // Ctrl+Shift+Z
  } else {
    keyHandler.bindAction(89, true, "redo"); // Ctrl+Y
  }

  return keyHandler;
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
EditorUi.prototype.destroy = function () {
  if (this.editor != null) {
    this.editor.destroy();
    this.editor = null;
  }

  if (this.menubar != null) {
    this.menubar.destroy();
    this.menubar = null;
  }

  if (this.toolbar != null) {
    this.toolbar.destroy();
    this.toolbar = null;
  }

  if (this.sidebar != null) {
    this.sidebar.destroy();
    this.sidebar = null;
  }

  if (this.keyHandler != null) {
    this.keyHandler.destroy();
    this.keyHandler = null;
  }

  if (this.keydownHandler != null) {
    mxEvent.removeListener(document, "keydown", this.keydownHandler);
    this.keydownHandler = null;
  }

  if (this.keyupHandler != null) {
    mxEvent.removeListener(document, "keyup", this.keyupHandler);
    this.keyupHandler = null;
  }

  if (this.resizeHandler != null) {
    mxEvent.removeListener(window, "resize", this.resizeHandler);
    this.resizeHandler = null;
  }

  if (this.gestureHandler != null) {
    mxEvent.removeGestureListeners(document, this.gestureHandler);
    this.gestureHandler = null;
  }

  if (this.orientationChangeHandler != null) {
    mxEvent.removeListener(window, "orientationchange", this.orientationChangeHandler);
    this.orientationChangeHandler = null;
  }

  if (this.scrollHandler != null) {
    mxEvent.removeListener(window, "scroll", this.scrollHandler);
    this.scrollHandler = null;
  }

  if (this.destroyFunctions != null) {
    for (var i = 0; i < this.destroyFunctions.length; i++) {
      this.destroyFunctions[i]();
    }

    this.destroyFunctions = null;
  }

  const c = [
    this.menubarContainer,
    this.toolbarContainer,
    this.sidebarContainer,
    this.formatContainer,
    this.diagramContainer,
    this.footerContainer,
    this.chromelessToolbar,
    this.hsplit,
    this.sidebarFooterContainer,
    this.layersDialog,
  ];

  for (var i = 0; i < c.length; i++) {
    if (c[i] != null && c[i].parentNode != null) {
      c[i].parentNode.removeChild(c[i]);
    }
  }
};
